For the upthread guy who uses 126 film-- it's the same as 828 film, IIRC, which is still available albeit expensive. Kodak just kept up their 828 lines, and put a plastic cartridge around the end product. Buy a couple rolls of 828 and you should be able to reuse the BP a lot. Or just keep buying 828 and stuff it into the cartridge, if you have the dosh.
828 is harder to find than 126 and has been out of production for about two decades. It was also shorter then 126 film giving about 8 shots a roll and does not have the proper perforations to sub. for 126 film.