When you find yourself looking for zippers for sale, start with zippershipper.com. They have a wide selection of zippers in a variety of lengths, colors and for various purposes. Whatever you are looking for, there is a good chance that they’ll have something to suit your purposes.
They carry coat zippers. These are generally the standard, bottom-separating zipper. They also have industrial zippers, that you can use on tents, sleeping bags and even for Jeep canvas. They also have heavy-duty marine zippers, especially for bimini covers on motorboats.
If you still aren’t able to find what you want, they also sell zipper chain by the yard, which gives you more control over how your zippers are eventually made. Zippershipper sells ends and sliders as well, so you can buy everything you need from them.
They also offer custom zippers, which will let you order exactly what you are looking for. These come in batches of 100 and take three to four weeks, but it gives you complete control.