Cherokee power window regulator.
LoL ....it pays to be handy.
Search the net you can get OEM window regulators at 2 for $200 for a 1986 to 96.
"Do a search for Grand Cherokee power window regulator"
After 96 I assume there were changes but I'd use the dealership as a last resort.
In my opion when you do the repair just drill the rivets out and use metal screws to fasten the regulator. Or if your a perfectionist and want to re-rivet you will need to get a special in-line riveter I believe.
Here are some links
www.A1electric.com I know they have window regulators for 86 to 96.
www.speedyautoparts.com