A little late for A response I suppose.

Most likely the wiring is there.

You should be able to use the existing rear door. If you look at the rear door panel there are 4 circles that look out of place like they should have a bolt going through them. On the hard tops they do have 4 bolts going through. There are hole in the door frame with nuts welded in to attached the rear window to. Drill holes and bolt the window in with the factory parts.

Tech tip: on soft top vehicles if you"ve had the rear panel off so many times you've broken all the little plastic snaps. Drill out these holes and attach with bolts and washers.

-Mike