Think it was these guys:
http://www.in-carpc.co.uk/
the least encouraging thing was that they didn't know their product inside out, doesn't really bode well with me.
I'll check my programme and make sure, but that looks right.
I seem to remember that custom pc (or was it pc format?) magazine did a feature where they built one themselves on a budget and fitted it to a camper van.
Another thing is; having a PC in you car, bolted in, that has internet acces is a major security hazard what with the liklihood for personal data etc.