Was going to build the D30 front axle under our ZJ but found a JKU that was already built, so...
For a D30 (XJ, TJ, ZJ etc):
Grizzly Locker, 27-spline (YGLD30-4-27) - $600 +s ($900 online)
Master Install Kit (YK-D30-F) - $90 +s ($130 online)
RCV 27-spline shafts (RV-D30-SET27) - $1100 +s...