I'd suggest taking a step back and look at the bigger picture.
What size tires do you currently have, and what size would do you think you'd buy when those wear out?
What size axle is in there now? Dana30 or 44?
Since you're going to be putting new gears in, do you think now is the time to re-gear to an optimal ratio?
Do you have any parts right now that you plan to re-use? (spare locker, gears, etc?)
Taking all of that into consideration may save you time and money in the long run. Otherwise, if you want to just replace the gears with the same that's in there, it's not too hard of a job for someone who's comfortable doing it. I am not that person but a case of beer for a friend who is and maybe gas money to come visit gets the job done!