I've been looking for a piece that clips to the quarter panel along the back of the window area. I obviously don't know the name of this particular piece but it seems to guide the quarter window as it is rolled up. Its a rubber piece and looks like weatherstipping of some sort. Sorry for being so vague but any help would be greatly appreciated...

I know the piece you are talking about. It is in the rear of the 1/4 window and on the inside. I have them and they are not repo'd. If interested send me an email.