the lcd panels you reference have 31 pin connectors, not 20 pin.
btw, those are nice panels. 600:1 contrast, 450 nits bright. decent viewing angle. A little slow on the response time (33ms) but still a good panel for all around use. Too bad they are 640x480 native, but in a car that is perfect w/a 10.4" panel. (IMO)
what model number are the ELO panels?
what inputs do you want on the lcd controller? (vga only, or vga + rca, s-video)