Does anyone have a CNG tank from their Hunter (or other boat) that they no longer use? Converted to Propane? My CNG source (in Ottawa) is far enough away from here (Kingston, Ont) that I'd like to find a second valve and then get a used 2250 steel scuba tank so I can then have a spare filled with gas on hand.The "Corp Brothers" size will sell a whole tank and valve for >$200, but with shipping exchange, etc, it's a little pricy. Anyone have a valve they are willing to part with or suggestions on where to get an appropriate valve?Chris