I've been planning to replace a RNS-E unit with a carputer (PC) for a while now. So far I've bought most of the parts needed.
The plan was to replace the screen with a 7" touch (it's a bit larger but I think I should be able to make it work) and keep the stock buttons and controls. I was planning on using phidgets to interface with the controls and replace the encoder control (rotary control) with a PR-1000 haptic unit.
How this setup would work for a PI I'm not sure though.