Aquaventure Dive and Photo Center
(Formerly Going Under Dive Center) 10024 County Road 81, Maple Grove, MN 55369
(763) 424-8717
I would suggest going to BCA's website and watch the youtube video on how to replace the o-ring, if you don't already know how to do it. Have the canister all set to refill before you get there. These guys refill my canisters every time I'm in town doing classes.
Mike Duffy
Avalanche1.com
Avalanche education for mountain riders.