I stuffed the door panel full with bathtowels - it couldn't move because there'* no where to go. I still have the regulator in pieces, waiting to hear about the $65 price because I don't have to tools to fix that little metal piece. I called two places today - one a Pontiac dealer was in Filllmore, NY, where LJJCS_AUTOMOTIVE lives. They didn't stock the part. The other was a GM dealer in my town, who quoted a price of $280.
I think I may just leave those towels in there and put the other door pieces back together, and NEVER use the other back window as long as I have the car