Hello, I have a GTD from 1991. I bought the 2 mm covers from Tornado for the light covers some weeks ago and after some adjustments I was able to fix them. They were bigger, no holes, no painting.
I put a screw on 2 as I think it gives a better look. I was looking to fix them without any effective screws but I didn't succeed.
For the windows and turn light covers I did them by myself with a 3mm polycarbonate thickness. Even if they were flat, it fits well for my eyes.
For your information, Franck from France