The last photo at the top of pg1 is the zipper.
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I used googleupper left corner:images:search words:zippers by the yard.
Sullivan's USA Make a Zipper Kit is listed at Kmart and Createforless.com 3 yards to 5 1/2 yards for $12.39 (Kit includes the zipper pulls). Createforless.com offers more colors. Overstock.com also has some and then I stopped looking. (I didn't fancy my zipper up on the ends, I just cut it and let it be as I cut it. I zip it, use safety pins to keep it from coming unzipped and pulling apart at each end. It is working perfectly.)