Only thing I found in the quarter panel was a golf tee. These same clips are also under the front door trim. It's hard to believe with all the repro parts in various catalogs, no one makes these. Must be used on various years and nodels
There is a company that has a huge selection of small parts. I have their catalog at my shop and it's got an amazing variety of stuff like this. I think the name of the place is Restoration Supply Company. I'll check when I go to my shop to make sure.
Found them! Restoration Specialties 2464 clp. $2.40 ea Dennis Carpenter responded quickly to my email inquiry and referred me to Restoration Specialties