I found a fire extinguisher company here in Montreal that is able to get me a used 10 pound cylinder. They also fill it with CO2, so that's great. Next problem is the regulator. Fire extinguisher company does not sell it. The only regulator I can find is from one of the better LFS but is going for $240. It comes with a solinoid. I also need an adapter to use on mutiple tanks. I see you Americans can get great prices (about half) on regulators from the internet stores. I have a US P.O Box so shipping isn't a problem. (Will have to sneak it past customs at the border) My question is, are all these things standard so that I can be sure it will fit my cylinder, and, have any or you had experience with any internet store to tell me about their reliability? The one I've found with the best deals is www.CO2-cannisters.com

Thanks for the info thus far, you've been great.