Buying new gears and selectable lockers for the ZJ and looking for someone that has a good reputation, knows what they are doing, and is not going to cost an arm and a leg.
Shadetree mechanics are welcome if they really know what they are doing and have a good reputation. Local shops around me want too much, found one in Nevada, MO that said $100 per axle for labor on the gears, not sure about the lockers, but it should not be much more.
The gears are 4.10 and the lockers will most likely be the new Auburn Gear Ected.