Checked the Steele site for rubber parts for a 31 A Coupe. Found something interesting I have wondered about. They have a rubber that goes in the metal channel to hold the door glass. This piece has a flange to seal the window to the outside when the window is up. Never seen this before, anyone used this? As stated, kind of pricey at $15.50 for a 36" strip.
https://www.steelerubber.com/channel...rip-20-2091-62