Inverter?

As in making 110/220 VAC? If you have access to one already I suppose you could do it that way and use the home adapter... If you know how to (or someone who does) do basic soldering (not at all on the level necessary for the lighted button hack), a cig.plug, a piece of 2 conductor cable and a barrel connector shouldn't be much money at a place like Radio Shack... Just solder it straight up, plug in the cig adapter in the car and the barrel plug (wheee paintball flashback! ) in the empeg and enjoy...

/Michael