Following is info provided by Jim Noel and posted by JetfireGuy:
Yes, the bottom glass holder (sash) in the door window frame is a problem. I did find replacement channel steel (not chrome plated) but decided not to use as it was going to require too much work and expense! Mine were rusty and had started to bulge from rust and de-lamination of the metal. I cleaned up as best as I could. Primed and painted silver (bottom sash only) and installed glass with new rubber channel all the way around the inside of the chrome frame. Replaced all the run channel fuzzy strips and top door outside rubber and inside fuzz wipers.
Have replaced all the vent window and roof rail rubber weatherstrip with repro’s from Steele. The goods look good but do not fit out of the box! I have days, not hours, into fit and adjustments and still not satisfied with fit. Steele is the only game in town and just have to work with the materials to get close, but not great! I can work on parts of a restoration for hours or even days still having fun. The window seals and weather stripping was/is NOT fun for me! Very frustrating when I put in so much time and am still not happy with the outcome. The next guy might like this part of a restoration, we are all different.