i did this like the previous week and was only able to finish it later on after i got my zip. cut the zip ends off and accidentally zipped the zipper out... twice. couldn't put it back and was too pek chek so went to buy a new one to sew on instead.
left hand side is the separate parts, on the right is how it looks like when combined. gonna be draped on my boots anyway.
oh yeah! doing this is so much more cheaper than getting new boots! it's almost free! (well i have a lot of pvc...)