I took the driver door panel off today due to the door handle requiring a super pull due to wear and lack of lubrication. The assembly is worn badly enough to need replacement. The origionally round release pin is worn flat on opposite sides! ( Luckily I have a few spares) The door panel itself was wet, and the lower section is mush. I want to replace the cardboard or whatever the stuff is on the lower part of the panel. I suspect a lot of 240s have this issue due to cheap owners like me who wont shell out the now 70 bucks a set for the outer window seals.
I ordered three sets today for my 240 fleet.!! I recommend anyone who plans to keep one of these cars to inspect them today, and replace them immediatly. The only difficulty is deciding to purchase them. The water leaking in the door panel will cause many problems, much more serious than parting with the 70 bucks.

Anyway, I welcome advice on material used repairing old inner door panels.