you *might* find some at a local shop but it's very rare. It's something that's mainly used by the garment industry and hasn't really made it to the home sewing market (thank the diaper-sewing mommas for bringing it to your attention
I get mine from VeryBaby.com. I have some of the plush 1" kind on hand that I can sell you wholesale if you're desperate and shipping should be less than a dollar, since it's so light. Just PM me with your address and I'll stick it in the mail tomorrow. oh, and I also have some of the thinner, shiny 5/8" kind.