Oddly, that’s the only one I see, at least immediately.
As an alternative, you can always pick up a cheap inverter. I have one in the Jeep we use all the time and it wasn’t very much at all.
They plug into the 12v cig lighter and put out 120 volts. It’s really cool.
Something like this:
http://www.amazon.com/BESTEK-invert...qid=1360817383&sr=8-6&keywords=power+inverter
Mine in the Jeep is bigger, but we off-road a lot and really need some power sometimes.