Everyone pretty much agrees that the safest/best thing to do is order a LUK clutch set (it comes with a pressure plate, disc, Throw out bearing, pilot bearing, and alignment tool.
If you are lucky someone local will carry them....I wasn't lucky...so I went against the grain and got a different brand, but if you plan on keeping your jeep get the LUK.
If you can't find one locally, expect it to run around 200.00 for the set shipped to your door (thats what it was going to run me, but I didn't feel like waiting).
DO NOT resurface the flywheel.. or you'll be replacing it. just scuff it up with 180 grit sand paper, unless it has obvious problems. this is at least true on TJ's. I assume it is for you.