I see a couple of Mopar part numbers for the windshield molding retainer clips. #6000685 and #6000927. New retainers usually came with the molding packages, so loose or separate retainers can be difficult to find.
I found an old discussion here:
I would like to thank everyone for your help. I finally found the upper and lower windshield trim clips for a 1964 Chrysler Newport at Quirey Quality Design Co in Windber PA. the parts numbers are 361-B and 704. thanks again