I just discovered another DirecTV receiver that runs on 12VDC input. The Samsung SL10D10, which is a D10-200 receiver combined with a 10" LCD TV. It does have A/V outputs, so it could feed another TV bit I'd imagine the 10" screen might be good for a truck. It's not in production any more but they can be found on eBay on a regular basis, usually for less than $200.