A brand new 5 lb CO2 tank is $90 + tax at KMS Tools in Coquitlam,
KMS Tools Online It is a special order as they do not normally carry them with the proper co2 valve. I got the rest of my hardware when Canreef was still operating, J&L sells regulators, solenoids and valves. I am sure KMS or Liquid Air, where I get the CO2 refills on Ontario St, just of Marine Drive in Vancouver would be able to find suitable equipment. Liquid Air was the only place that I could find that would fill my tank and not do a tank exchange. It takes about 10 min and costs me $23.
Scott