You might give Ed Clarke a shout, 914-834-0326. I don't want to be negative, but Ed was talking retirement, so I'm not to sure he can help. I don't remember him having many '37 parts. There is a company called Steele Rubber that may have something close to what you are looking for. Dennis Carpenter also has door seals that might be compatible to the '37.
While I have you guys here, what mirror do you run on your passenger door? I have the swan neck type on the door hinge pin, but it is in a position that I can't see from the driver's seat. I can't even tell that there is a mirror!Completely hidden by the door post. Is there a good one that will attach to the wood of the passenger door?