Well, you can get them right from
Innopak. But you have to buy a pallet of them at a time, so maybe you can get together with your friends or something and get one. Other than that, you can talk to the produce or store manager at your supermarket. They'll be glad to hook you up with a roll of them for whatever their cost is. I used to work in a grocery store and we had organizations and whatnot ordering our stock supplies.