I buy my bubbles from http://stores.ebay.com/Linda-Lees-General-Store_W0QQssP...3amefsQ3amesstQQtZkm
Also, I put two inches of peanuts under and on top of an item. I then cut the corners of each side and fold the sides down. That fills any void without wasting peanuts and bubble wrap.
I saw that trick once when I ran out of peanuts and took something to the UPS store to get something shipped ASAP.