I have to replace a broken zipper in a customer's son's backback. It's 43". So I went to weaver's today. She's getting my box ready and I notice all the stuff and ask if directions come with it. No I was told but I'll need to buy the $32. tool to make it all work. What?? For one thing this metal zipper was way too big for the project, and for another, I need something I can use a hammer with. Where can I order a length of metal zipper, the stops, and sliders & use it without buying a special tool? Thanks.