Actually looking into the same thing. Let me know what you find. I've found some electric ones online. They cost less than the gas powered ones too. Not sure if there is a huge difference between electric and gas in terms of capability.
'11 BMW E92 ///M3 - ZCP and DCT
'13 Toyota Tundra - 4x4 Platinum CrewMax, 5.7l iForce V8