eeediot,
anywhere that provides goods for commercial plumbers/pipe fitters/welders will (or **** well SHOULD) have liquid N2. Praxair comes to mind. I would think most would deal. The problem is storing the stuff. It typically requires a vacuum Dewar which can be expensive and dangerous in the wrong hands.
you might also be able to pull off the ice cream trick with dry ice, which can be stored for a day or two in a couple brown bags in a styrofoam container. Also avail at praxair. |