I buy mine at a local store, I forget how much they cost, but I know their cheaper than that site. I think I paid $180CDN for a 3 bag set two years ago.
If you want to make your own, go to a T-shirt making store (or something similar), and ask them to sell you some 'silk screen'. If they have different qualities, buy a few different ones. That's basically the bottom of the bubble bags, just 3 different sized silk screens. It works, but the bags work better.
I'm gonna hold a contest for one of mine though, so hang in their MP!!
I just gotta think of something for the contest...........
