Rear locker

[springer]

Ok I have the base model and not having a rear locker sucks this is the first 4wd vehicle I have ever owned that doesnt have a locking rear diff. I work at a GM store in parts, but we are not a hummer dealer. I need some of you guys help trying to figure out what all is needed for me to put a rear locker in. In my parts catalog I found an e-locker kit which consist of the locking mechanism and a couple of other components and then the switch not sure what else I will need. Also it looks like the switch is in the dash with the 4wd selector switches, but I cant figure out where it would go. I am also not sure about the wiring. I might just need to wait for an aftermarket kit just thought some of you guys might have an idea.

Thanks
Tanner