i had this issue when i bought my LJ a few years ago pumps were seized up and full of water, lines into the axle rotted off, memorys not there now but i believe i looked around a bit and couldnt find the fittings and didnt want to pay 400$ for a set of new air pumps, being inexperienced i tried drilling and fitting the diff cover first thinking thats a little less devastating if i mess up, leaked nonstop and the line kept kinking or coming undone, its pretty difficult to work in that area with those little fittings no one seems to make hose clamps of any kind that small, ended up doing away with that and welding some 1/4" air fittings together and through the diff in a spot where there was room, i was trussing the axles at this time so they were out of the jeep and stripped and cleaned already, this worked better but i was using a small tank and ball valves to try and fill the tank to 8psi and then open the valves to the lockers i didnt end up using them much.. im in the process of reworking them a little now and can let you know what i come up with try and grab some pics while im at it but thatll be a few weeks