Windshield trim help

I am laying out my trim for my F coupe. the front windshield 5 pieces are ok and not bent too much, but the rear window trim is a bit troubled. The lower 2 pieces are perfect, but the "L" shaped right and left pieces that run up the side and across the top have flattened. What I mean I need them to conform to the contour of the window across the top. I wish I had an English wheel to put a bow to the pieces.

Any ideas?

Is there a way to cheat with some modern rubber window trim, like on a modern car. My trim is black anyway, so black rubber would not be a drastic or obvious contrast.

I can wok with this, but it will be slow. Any sources for replacements - new, NOS or universal? I can hit local auto grave yards for used - there was 3 in the locals.
Author: slant6billy