source for screws for 70 dart vinyl top trim

I am looking for a source for some odd screws for the installation of the C-pillar vinyl top trim for my 70 Dart. These screws are not seen when the trim is in place (not the chrome phillips screw at the side window end), but rather odd screws with a raised head that the trim actually pops onto (you screw it into the sheet metal and then pop the trim onto it).

Thanks for your help!!!
Do they look like these? I did a search on fleabay under Mopar vinyl top trim screws.s-l400.jpg