Wefco Rubber Manufacturing Company, Inc...
www.wefcorubber.com
Look it up on the internet.
When I restored my 1929 Standard Coupe 40 years ago or so, I went through the same Bulls&%$ that you are going through right now.
So I contacted them, sent them the best sample that was in the three windows originally, and they sent me back what was very close to the original.
For all you purists out there, the FORD Part Number for the Quarter Windows is A-46790. For the rear window is A-47086. BUT...It is the same type of moulding for all three. The FORD Archives also has Part Releases and Drawings of this moulding...So to get really techinical, you can get the drawing and send it to Wefco so as they can match it up even more!
I also got the correct rubber channels and tubing to do the door roll-up window channels...If you have the original hardware...you can make your own!
They are still in busisness...as a matter of fact I just orderd some hollow round tubing for my 1938 Gilbarco Gas Pump I am restoring.
But if you are in a hurry...well, you get what you get!
Best I can do for you on this end.
Pluck