In a slightly off topic but related case i was looking for a smaller bubble mailer. I usually only ship 1 or 2 or at most 3 out at the same time. I was hoping to find one that was about the size of a number 10 envelope. I did find this

http://www.fastpack.net/News.idc?ID=60

Its pretty small (4x5, whereas as a 000 bubble is a 4x7) and they will send you a free sample.