Assuming you have a high pinion D30, I have a set of Dana/Spicer 4.10s. They are factory 4.10s out of a YJ that had about 50000 on it (my YJ, I removed them myself). They are in great shape. Nothing wrong with them, I just never got around to installing them before deciding to sell the XJ. Ive also got a D30 master install kit (still in sealed package) and a new set of D44 4.10s (and install kit) if you need those.
$40 for the D30 gears or $80 for the gears and install kit.
Good, $40 it is, you pay shipping if you want to have them shipped. You're about 3+ hours from me so picking them up isn't out of the question. Just let me know how you want to do it. If you want them shipped, give a me a zip and I'll give you a total. I'll snap a couple pics for you later today.
Ray