Hi Alan,
Since the Frua's rack is MGB, you should look into racks used for MGB or MGC power steering conversion kits. As far as the pump is concerned, I would look at 1968 to 1973 big block mustang items. Pump, bracket and alternator bracket (Alternator will have to be moved and the header tank will have to be replaced by a Ford item like the 427 MKIII). I am not sure if they will fit without engine bay modifications. However, I don't know why you want to install power steering, the steering is quite light anyway. By replacing iron heads and manifold with aluminum items, you save about 300 Lbs up front making the steering effort even lighter.
Regarding body parts, find yourself a good metalsmith and have him beat new panels. I don't think you will find any new panels anywhere!
Good luck!
Emmanuel