Don't need anything spectacular - these will be a project for making half doors. That's pretty much the only criteria - just need to be for a 2dr cherokee.
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07 Powerwagon, pretty much stock besides Line X bedliner and dual exhaust. Quad cab, fully loaded (minus nav), etc
92 XJ sport, 33" boggers, 4.56 gears, rear locker, more to add
07 Arctic Cat 400 4x4, lockers front and rear, 2500lb MM winch
The first is the hinges. However 97+ doors will physically bolt to the older hinges with very minor modifications.
The major thing is the door striker. They striker itself is different, as well as in a different location. So without modifying your stricker and it's location the 97+ doors are unable to "shut".
And lastly, the body lines are just a tad bit different.