to the OP, i have a built up D30 front and CH D44 rear, both 4.56 with aussie lockers if you are interested in them.
i think i am going with a D60 and Ford 9 or something soon. the axles do need seals and should be gone through but can be done without any special tools, also easy as they are not in the XJ.
rebuild, clean up, primer, paint bolt in and go. PM me if you are interested.