Can anyone tell me what type of hitch will fit a 91 XJ sport, I am looking for both front and rear hitches.

What are you planning to use the hitches for? If its for towing any of the major players( Reese, Uhaul ) are good. Don't bother getting anything more than a class 3 hitch, your XJ's not rated for more that it would allow anyway. If its for a moveable winch consider getting a new bumper for the front and rear with a 2" receiver built in. Its got a higher mounting point that will help with approach and departure angles.. Just type in JEEP BUMPERS in your favorite search engine.....Happy hunting!