what type of locker is best choice?

[Dave92270]

I wonder - couldn't Hummer dealership just install factory rear locker? Plus they could replace the control panel on the dashboard for the one with locker button (which our panels are missing) to have it all neat... I'd gladly pay couple of thousands for such a modification rather then trading-in my H3 low-milage (under 10k miles) for adventure model.