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

Kern Dog said
I need the clips for the quarter panels but if I actually try to remove the trim on the doors and fenders, those may crumble too.

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I have not seen these listed anywhere but maybe I just haven't looked hard enough. Do you know of any company that makes them?

I didn't find anything listed specifically for your car at Mr. G's Enterprises, but maybe they have something that's close enough for government work. :D

They have many types of mould clips (plastic and metal types), as well as miscellaneous retainers.

Mr. G's Enterprises - Auto Fasteners