I get all the other stuff that I need for printing with amidol from The Chemistry Store. Great prices and they're pretty fast. They have hypo (sodium thiosulfate pentahydrate - rice crystals), sodium bisulfite, KBr and citric acid. Their price on sodium sulfite is the best I've found anywhere. (13# for $19, 25# for $31). Whenever I bought Kodak Na2O3S in the camera store it was about $10/#. I highly recommend them.