You can find them at any sporting goods or better yet: any outdoor store. Heck, i'm sure that you can find them at www.rei.com
, ww.dsports.com or wherever.
Oh yeah, I had to laugh at the thought of wearing mine around my waste. haha! (sorry to bug your spelling)
I'd get rid of the Jansport and get an Arc'teryx fanny pack. Super Cool!
Seriously though, if you really get one make sure you get something that has either an inner zipper pocket for your wallet so as not to make it easy for pickpockets to rip you off. My Arc'teryx has an inner fold that I slip my wallet in which makes it harder to steal. My old fanny pack had an inner zipper on the back side of the pack which make it very hard to steal. I like wearing my pack on my back waist and not in front even though it's probably easier to steal that way.