Inigma

Hi everyone or anyone. Can someone please help with the correct description and size of the two retainer push pins that hold up the plastic interior trim piece that spans across the bottom of the back window of a Z06 (I presume FRC as well)?

I bought a large combo pack of various retainers off amazon and one of the pins (1/4" hole, 9/16" panel skirt blind rivet) is close, but seems to be just a little too wide and a little too short. I can push them in, but it takes more effort than the stock ones ever took and they keep popping out every few days. I'd like to get the correct ones placed in there.

I apologize for the lack of pictures. I'm currently at work. If pictures are needed, I can update late this afternoon.

Thanks in advance for any help.