I saw more datalux touchscreen's on ebay. I have one and these things are great! They're realy cheap for a good tft screen with touchscreen, and these plug right into the vga. Be careful though, I have seen some models that require a special video card... I think those are really old models. Just go to ebay and search 'datalux'.
Still setting it all up:
FV24 with celeron 900, super tiny custom case, Datalux 10.4 touch screen in the Subaru Outback