Is there any company that reproduces the trim clips for a 1967 Dart GT ?

Yes, we have a local paint supply house that carry’s those clips.

Thanks, John. I'd be surprised to learn that these are something so simple and universal that a paint store has them. I hesitate to remove the trim to even take a look at the design of the clips for risk of not being able to get to stay back on.

If you can't find original style clips you might have to use a clip like this.
[URL]https://www.rosevillemoparts.com/product/67-72-dart-vinyl-top-moldiing-trim-clip-kit/[/URL]

I guess the only sure way to know is to put my eyes on what is available and see if I can make it work.