Jeff,
Here are a few hints to start off your searches. Many of these suppliers overlap in their ranges. There is a Spares Coordinator in the A.C.O.C. see ACtion for contact details.
Brian Eacott is a good source of advice for everything being ex A.C. Cars Ltd. You now owe me a beer.
1. Front and back emblems with Bristol banner - ACOC spares scheme perhaps.
2. Front headlight trim rings -
http://www.holden.co.uk/default.asp 3. Chrome hood key hole covers and key - Escutcheon and T handle
https://www.vintagecarparts.co.uk/search?query=escutcheon 4. Trunk handle -
https://www.vintagecarparts.co.uk/search?query=escutcheon 5. License plate light and lens -
https://www.vintagecarparts.co.uk/search?query=escutcheon 6. Rear tail lights -
http://www.holden.co.uk/default.asp 7. Inside trunk clips for jack, etc -
http://www.aerohydraulics.com/p-gm-158781-1357057.aspx?&utm_source=GoogleMerchant&utm_medium=PriceComparison&utm_campaign=Froogle201512&gclid=CO-l9PTT0ckCFde6Gwod7X0APA 8. Trunk prop rod or telescoping rod - WB boot lid stay
http://www.carbuildersolutions.com/uk/bonnet-boot-lid-stay-small 9. Chrome Gas cap - Candess ACOC spares scheme perhaps.
10. Inside door handles and strikers - WB Silent Travel. There are many scruffy reproductions about, but Paul Beck here has correct ones
https://www.vintagecarparts.co.uk/search?query=Silent+travel 11. Side window wing chrome inserts I think there are 8? - Ferrules. Get some turned at a machine shop in stainless
12. Do you sell a screw and bolt kit for the car? Just misc. BSF and BSW as well as the flat head machine ones? - You will also need many 2 BA round head chrome plated brass screws, mostly 1/2", but there are some longer ones -
http://www.polished-stainless.com/ 13. Complete wiring harness from front to rear - not exactly correct for early cars
http://www.autosparks.co.uk/finder 14. Horn and turn signal components and horn cap - Oh dear really a headache, so many have been wrecked by The Improvers who try and prise them out of the steering wheel without undoing the union nut on the end of the stator tube.
http://www.scparts.co.uk/sc_en/british-cars/triumph/triumph-tr2-to-tr4a-1953-1967/steering/steering-box-and-steering-wheel-tr2-tr3-tr3a-and-tr3b.html 15. All of the dash switches and lights -
http://www.holden.co.uk/default.asp 16. Brake master cylinder -
http://www.powertrackbrakes.co.uk/ 17. All of the brake lines and hoses and clips, I do have the 2 junction blocks -
http://www.powertrackbrakes.co.uk/ 18. Clutch slave and hydraulic master cylinder including the lines -
http://www.powertrackbrakes.co.uk/ 19. Do you sell all of the u joints? I want to replace them - Brian Eacott Tel/Fax +44208 397 8472 Mobile +44 7885 945193
20. Front rotors, pads and calipers. Do you sell caliper rebuild kits? - Brian Eacott Tel/Fax +44208 397 8472 Mobile +44 7885 945193
21. Rear shoes, spring kits, and wheel cylinders -
http://www.powertrackbrakes.co.uk/ 22. Emergency brake cables - Handbrake cables and clevis pins Brian Eacott Tel/Fax +44208 397 8472 Mobile +44 7885 945193 or
http://www.speedograph-richfield.com/ 23. Suspension bushings (16) - Brian Eacott Tel/Fax +44208 397 8472 Mobile +44 7885 945193
24. King pin kits - Brian Eacott Tel/Fax +44208 397 8472 Mobile +44 7885 945193
25. Steering wheel (wood) - There is the lightweight A.C. wheel and the Derrington wheel often supplied for competition cars. Ask nicely and they will omit their non original Moto Lita engraving
https://www.moto-lita.co.uk/our-products/Wheel_Details_01.aspx?WH_ID=10 26. Interior kit, Black leather - Skilled upholsterer + Bridge of Weir hide.
http://www.bowleather.co.uk/ 27. Tonneau cover snaps - Lift the Dot or Tenax, early cars had Tenax. The SVB Tenax are nearly correct, but there are many different patterns now from many suppliers
http://www.woolies-trim.co.uk/c-58-lift-the-dot.aspx or
https://www.svb24.com/en/tenax-tenax-fasteners.html 28. Rear end gaskets, side and 3rd member one - Tap them out from paper gasketing.
29. Steering box rebuild kit - likely only need a new peg and oil seal maybe ball races, the cam seems to survive well
http://www.scparts.co.uk/sc_en/british-cars/triumph/triumph-tr2-to-tr4a-1953-1967/steering/steering-box-and-steering-wheel-tr2-tr3-tr3a-and-tr3b.html 30. Shocks - Dampers should be Armstrong, get them rebuilt or copied. Having a shorter length extension is a good idea.
31. Possible spring bushings front and rear springs - Brian Eacott Tel/Fax +44208 397 8472 Mobile +44 7885 945193
32. Steering shaft gasket that goes on the footbox - copy in leather maybe.
33. Rod ends for front suspension - Steering ? Must have grease nipples. Brian Eacott Tel/Fax +44208 397 8472 Mobile +44 7885 945193
34. Door, hood and trunk weather stripping -
http://www.woolies-trim.co.ukĀhttp://www.orsonequipment.co.uk/ 36. Over riders - Maybe nil stock. These are for later cars.
https://www.smallfordspares.co.uk/categories/small-ford-spares-chrome-fittings-and-body-parts?vehicle=prefect-model-e493a-1949 37. Front Turn signals lens and base - sidelight
http://www.holden.co.uk/default.asp 38. Front Grill and surround Steve Gray A.C. Heritage
http://www.acheritage.co.uk/ 40. Fuel Filler hose to gas tank
http://www.viperperformance.co.uk/productsearch.php?xscId=9842 41. Smiths heater box and two defrost vent hoses - A bit girlie on an Ace ? Anyway were they not Delaney Gallay ? You do see them on ebay.
42. Did some cars come with windshield squirters? - I have seen them with one double, mounted centrally and two separate singles.
http://www.holden.co.uk/default.asp 43. Speedometer with clock Ace or 2 litre Saloon - 2 litre ones only go to 100 mph
http://www.speedograph-richfield.com/ 44. All of the other instruments except the rev counter - They can be found, mostly for Cobra kit cars, the faces should be printed in correct style with open chaplets. The ammeter should be Lucas and was not a match
http://www.speedograph-richfield.com/ Whew.... That is a list...
- Which is why you owe me two beers.