Ken,
Thought you had sold the Jeep? Anyway the UJs your looking for are 5-260x, they are the same as the ones used on the front/rear prop shaft as well. I've always got mine off Rockauto or Ebay. I always spend the money and buy the Spicer versions, you also have to choose between greasable or non greasable and this is personal preference. If your around this weekend the Terenure car show is on, we have a offroad stand at it and I'll be there. Regards Andrew