http://www.ebay.com/itm/151444679374...%3AMEBIDX%3AIT
Found this on eBay. I should be able to fill my BCA float canister here at work. I work for the fire department and we obviously have plenty of scba's. Id be willing to bet if you had a friendly local fire department they would also be willing to help you fill your canister with this adaptor and their tanks.
ETA: This did work and it's easy as pie. Stoked I don't have to drive 100 miles round-trip to refill my canniister. Hope I'll only be refilling once a year post yearly test.