Anyone experienced replacing the clips and the trim on the rear window of a 1980 Elkie? Seems to be two types of clips. I am beating up my trim trying to remount it. The wind up loose and falling off.

I would also like some details on the instalation of the rear window clips?
I know that the pins around the window had whit plastic clips that clip into the aluminum trim to hold it on, like the front window. But what is the style of clip for the window trim, is it available at local auto parts store?
Are there any tips in installing the rear trim its tricky I hold it up to my window and its not easy to attach it well?