We've now determined that AC's and Cobras used the same rubber bumpers & brackets as anti-rattles for side curtains.
Have you wondered what that hole was for in the front door jam? You know, the one that's visible when you have the door open. That hole held the same type rubber bumper as used for the side curtains. These are now available from:
Precision Auto Restoration and Vintage Seats
4 Mulliken Way
Newburyport, MA 01950
Tel: 978/463-8144
E-mail: cars1@verizon.net
These are not some 'will work' part, they are as they say "dead nuts on"!
In the near future, chrome "L" brackets will be produced.