Well, I found out that Diamondpoint are a UK agent for the Dr-Berghaus range of TFT controller boards. I've just orderered a replacement controller, and cable set for the Toshiba screen I have after I broke the original controller. Cables, Controller, OSD panel, and p&P and VAT came to £189 and they will sell single orders as well as account buying.
I can offer any assistance if I you want it. Work for a web dev firm in Manchester, as well as being into the carPCs as a hobby.