As all 205 convertible drivers will recognize, the window rubbers on the doors will shrink. My CTi had the same issue. New rubbers are not available and parts cars all have the same issue. So, you have to be creative.   I took the window rubbers of a mk2 (2007-2014) Renault Twingo. The Twingo obviously is a car with door frames like the 205 hatch, so the edge where the inner and outer rubber touch is from a cut 205 convertible rubber.   I think the pictures speak for themselves. This is still a prototype. The Twingo parts fit the 205 door perfectly though. The last job we still have is to glue the Twingo and 205 rubbers to each other. We are planning on using the vulcanization glue you use for mending bicycle inner tubes. If some else has another suggestion, I would really like to hear it!