I think the one you mean is the pack with the little elastic belt bits with buttons?? If so, they're around $30 for the pack of them. Bra's n things have them and I think Target?? The ones Skye is talking about I think are the bands?? The ones which are basically a piece of t-shirty type material sewn into a circle which you can use to cover gaps between shirts and pants.

Hope this helps!!