I have a 1995 XJ that I love dearly. It doesn't have a rear window defroster (no heating element in the hatch, just clear glass) and no switch on the dash. My question is, was this as option that was available for Cherokees? All the other XJs I've ever owned have had a rear defroster.. are they pre-wired for heated glass? Could I buy a factory switch and hatch from a junk yard with the heating elements bolt it on, and maybe find wires behind the dash/above the headliner? Thanks for you time and any information!