I have this part that was laying around my 73 chally when I pulled it out of the field years ago. I was thinking it was the weatherstripping that goes between the quarter window and door glass. But on both of my quarter windows, I have a similar looking stainless piece on the edge (except there is no rubber, just a bare groove). Then I got to playing with it, and it the piece actually fits on the door glass edge, but I couldn't remember seeing a challenger with two stainless pieces so close together in that area, and it wouldn't have enough room to roll up and down, I'm pretty sure. Is this even a part for a challenger? Only got one, so probably a spare of some sort? I guess I need to know what it is, and then secondarily, what weatherstripping goes between your quarter glass and door glass. I have seen them online, but they too have that stainless piece, and I already have those on the quarter glass. Can a man just buy the rubber part? Thanks in advance