Vinyl top trim fasteners - looking for source

This a screenshot of what the seller dith612 has on eBay. You can see the threads stop. Someone else on here found these in another thread. No mention of head size but looks the part. View attachment 1715634943
These are designed to hold a clip and not the trim directly, if you look at the original posters screws they have a chamfered head and are a different diameter. I tried these and they do not work.


Alan