6-7 years ago we parked my 55 bird next to my buddy's 56 Nomad and spent the winter doing the window channels, lift mechanism, door latches, etc. Almost all the bit and pieces come from restoration specialties. Those guys knew exactly what you needed, it all fit fine, and it was cheaper than the "specialty shops" that only do specific cars.
Since the doors were empty, we cleaned them out, brushed some POR15 as needed, and put some sound deadener (left over from the floors, like dynamat) in.
When the rain in Seattle quit we took them out, and the difference in the rattles and noise was amazing. We didn't realize how bad they were.