I've found a few medical suppliers for it so far. a bit expensive, but would definately be worth stowing in a backpack. or in a mid to large survival kit. The stuff in pure magic as far as i'm concerned. uses very little water.

Slight warm feeling, but molds right to the affected limb or area like a glove with no muss or fuss. hardens like a rock in under half an hour, pre-padded... The stuff of dreams in the sticks.. SAM splints hurt when being molded to the limb.

sweet...