I'm hunting for sinks right now and came across this on ebay. For those who might be interested, it has a self contained heater and pump. It looks like it requires 110. The seller bought nine of them from the Dept. of Energy. They've got huge Pelican Cases and were originally designed as portable surgeons scrub sinks that could be dropped from planes.
There are six available.
-Ben
Link: http://cgi.ebay.com/ws/eBayISAPI.dll?ViewItem&item=8806087290