After hearing some people complain that their Supercat stoves run out of fuel before they reach a boil, I started searching around for a can that would have a higher capacity. I think this one does the trick:
http://www.freewebs.com/jasonklass/thesnowcat.htm

I doubles the capacity of the Supercat from 1 oz. to 2 oz. and is a little wider to increase stability.