Jacket zippers (separating zippers) are trickier to repair - It is MUCH harder to replace the zipper pull from the top end of the zipper than the bottom, and with separating zippers you can't really get the zipper pull off the bottom without removing the stop which you can't really do. So yes, on Jackets you have to just replace the zipper - on a bonded zipper/jacket like you are talking about, I would contact the company and see what they have to say about it.