The homebrew shops can't point you in the right direction?? There must be a bigger, better, badder homebrew shop you'e missing...
Look for welding supply places in the yellow pages. They usually fill CO2 tanks. Or fie departments or places that fill fire extinguishers.
Oh don't give me none more of that Old Janx Spirit
No, don't you give me none more of that Old Janx Spirit
For my head will fly, my tongue will lie, my eyes will fry and I may die
Won't you pour me one more of that sinful Old Janx Spirit