besides ARB, and the shaft changeover to 31 splines, this was found on facebook.
if i'm a bit late, and this is a repost, my apologies.
http://www.facebook.com/note.php?note_i ... 735&ref=nf
i made the call, and the gentleman i talked with explained that they make one for the 31 splines now, but not the 33.
he then got into asking me how many guys are using their xterras off road, and if there was a need to have a locker due to the prototyping costs and so forth...
i told him that our only option for aftermarket lockers is ARB, unless axle shafts are swapped out or a lincoln locker is used... ( ugh ) i told him it would be nice to put a set of lockers in front and rear for the cost of the ARB rear and compressor setup.
maybe if they broadsided with an onslaught of calls or emails, then things will happen.
be well.