I read that, I have a ARB up front.  So all I should need is the steel XL-7 front 3rd member???
I've been looking at the Calimini Anvil.
For all steel beef, you'd need the XL.7 3rd member and Intermediate (what do we call that thing?) housing. Your gears and locker will fit in there. The other two options are GV 3rd member from a manual and the Anvil housing. All of these can be mixed and matched depending on what you run across/budget. All of these parts are available from either aftermarket vendors or, the factory stuff is on the books at, your local Suzuki dealer.
On the XL.7 be sure to look for manual transmissions up 'til 03 when all are steel. (These were the findings at my last parts counter chat.)
Oh yeah, one more tid-bit... The XL.7 3rd member housing bolts differently to the crossmember ( a stronger way) this requires a new two piece mount which can also be ordered at the dealer.
Good Luck, Eric