Small Touch Screen for Windows

[Gilthanis]

I'm getting ready to add a computer to the dash of a car and have all the parts but a few small adapters and the inverter. (this is a custom build not one of the commercial kits that start around $1600) The biggest thing I'm looking for is a small LCD touch screen display that works with Windows. I know I can go to Walmart for 7" displays, but they don't have touch screen technology. I have looked on eBay, but most of their touch screen displays that small only work for the dvd player and such and not for actual use with Windows. Anybody got any ideas on where to find some cheap? I'm trying to avoid using wireless mice and keyboards for clutter purposes.