Well, I went out to my car yesterday, and I, too, have a small gap of maybe a 1/4"
I had just never looked. I am going to do what I did on the re-upholstered door panels, which is I had my upholsterer make a small black leather welting with a lip that closed that ugly gap that the original door panels always had and that I hated. The door panels now look as contemporary as any modern car's door cards.