I'm modifying a set of door panels from a 95 camaro for my 91.

I need to trim off a part of the plastic underneath the carpeted part to make it follow the shape of my door properly. This isn't a pic of the actual door panel, but it illustrates what I mean.



Anyway, I had to seperate the piece with carpet on it from the rest of the door panel by cutting off the plastic "rivets" that keep it together.

What is the best way to reattach this piece?