1972 dodge dart vinyl top trim fastners

I'm not sure if anyone else has had this issue, but I'm wanting to reattach the vinyl top trim on the back of the car. I found the plastic slide clips on Ebay, but where the trim comes to a point, there needs to be a fastener bolting into the car. I cant find these anywhere. Does anyone know where I can find them? Or if there is something else I could use?
Any help is appreciated! Thank you!