Edit: ^^^There is a very narrow generation of 10 speed non-dynasys (ie road-compatible) Shimano mountain bike parts that are still available. I don't have the time to research it right now; just sayin' Second Edit: You can always hack a triple shifter into working on a double crank/derailer, the problem is when you're trying to use incompatible triple shifters and triple crank/derailers.

Anyway,

How about standard brake levers, and short grips (or a short amount of bar tape, perhaps JUST long enough to fit in your hand) with bar-end shifters?

Or twist shifters. I've read that people make aftermarket Shimano-compatible 10 speed twist shifters but have never seen one in person. You could always downgrade your cassette. I realize this is a silly suggestion but....