First and foremost, if you don't have one already, you will need an air compressor. Any of the following will work:
CKMTA12 - ARB Maximum Output Air Compressor (Requires an ARB Manifold Kit PN 1715103)
CKMA12 - ARB High Output Compressor
CKSA12 - ARB Locker Activation System
From there, ARB offers an Air Locker Accessory kit, Which includes switches, solenoids, air lines, and a bulkhead fitting kit. You can find that using the part number "ALAP2"