Source for waterproof zipper?

I replaced the zipper on my rain jacket with a waterproof zipper. I bought from a local gear maker when he was having his spring cleaning sale. Probably not the best solution for you – although he might mail order one to you.

Empire Canvas Works

Thanks, Sam. Thru-hiker actually had just enough zipper for me before their next order arrives, so problem solved.
I enjoyed looking at the products on the Empire Canvas website, especially the write up on the "Big Mitt". The anorak style seems to have disappeared from most manufacturers now, a style I really liked. I used to have a coated nylon Anorak rain gear that hung down over my half my shins. Great for paddling in the Boundary Waters! I also own a Marmot PreCip in an Anorak stlye, but its coating has worn off. Can't find them any more.