One of the folks I've corresponded with has located a source for Nupro needle valves for CO2: > Nupro valve model B-4MG2 (about $38): > > Minnesota Valve & Fitting Co. > 15901 West 78th St > Eden Prairie, MN 55344-5799 > > (612) 937-1160 > > They ship UPS and accept MasterCard over the phone. Dave Thorsen is the > sales rep for western WI. Thanks to Augustine Rodriguez <auro1013 at discover-net_net> for doing the legwork. George