However before you annoy them to much , be aware that the controllers are fairly expensive about 200 $, i think ??
My personal opinion is, for automotive use, by an entire new screen, parts-express has a very nice 5", and there are several other companies that are capable of delevering nice screen at descent prices.
If you are looking for a big screen, then the controller maybe worth it.
Another detail is the backlight inverter. This one can usually be ripped from the portable, but not always. these screens runs on higher voltages than your computer does (5/12 v).