[Flipside909]

Prestigeous Society exclusively sells the R-Spec/Datasystems DVD/NAV override controller. I have this same unit on my ISF.

You may want to utilize the "SEARCH" function as this question has popped up many times.

 

[Flipside909]

Yeah the selections are very limited. The most reliable and failsafe is the R-Spec/Datasystems unit. It's all plug n play.