My 2008 T2 with the V8 has a rear locker.
I did have to search a little to find one, though.
As already mentioned, the left side transfer case selector knob will have an additional diff lock symbol (shows drivetrain with all three diffs as circles. They're "filled in" as white to indicate which diff is locked). This setting is at the 6 o'clock position.
Fortunately, most dealers will take a picture of the center console, probably to show the cup holders! LOL! If they haven't, just ask to see photos of the center console. ;- )
I know the Aussies like the steel suspension for reliability, but I prefer the air suspension's adjustability. You get some nice clearance with the suspension in Extra Height mode. Because of the lack of articulation (in any mode!), a rear locker is necessary, IMHO, for 4 wheeling.