You could go to keylessride.com and you'll find a replacement FOB there. They also have'em on ebay, where you can also find an "original" one, from another Jeep of the same age (93-95 ZJ) - and they will work. Other years won't work.
I got the keylessride.com one because there weren't any originals for sale on ebay when I was buying, AND because I was told that those FOBs deteriorate over time because the infrared-emitting bulb-like-thingy gets scratched and what now, making the operating radius very small. Be that how it may, the replacement one works as the factory one - has to be pointed to the dome-thingy on the interior roof console. Radius is very small, but that's the IR system's flaw...
Beauty is in the eye of the beer holder
* 1994 ZJ (by VIN) with a 1995 engine (PO knows why)