I buy all my zippers at HomeSew , great prices lots of colors. They just had a .99 cents shipping coupon code L06 .. not sure if its still valid. I used it a few days ago ordering some zippers but that was the end of August. It shows up as a credit on the invoice. It confused me at first I kept looking at the shipping charge and it did not change .. but it there but as a credit up in the items purchased area.
http://homesew.com/