I'm skeptical that you're going to find one. You seem to be talking about reverse engineering the whole canbus setup. While I know that's doable, it won't be an easy task.
One possibility would be to retro-fit an earlier DCCD system into the car but, you'd probably have to switch harnesses, ECU and ABS systems too. You could also switch to an aftermarket ABS controller like the spiider. I believe it'll drive the earlier displays these days.