Did a search for this and couldn't find anything direct, so if I have missed something my apologies. I've got an old CWU-36P jacket, the one with the action pleats on the back, and frustratingly just one of the teeth at the very start of the zipper has gone AWOL. It is on the side that you slide into the zipper pull at the very bottom and keeps the zipper from loading the free side (if this makes any sense). My question is can just one tooth be replaced? Do I have to replace the entire zipper? If entire, any recommendations on where I might find a zipper (I've tried Googling to no avail) or to whom I might send the jacket for repair? It's an old favorite and I really like the pleats on the back over the more modern ones. Many thanks for any help!