I would think you need a transmission from a 4wd Toyota to bolt a reduction case on there. The output shaft is too long on the 2wd. (at least this has been found true on the auto transmissions)
Then you would need some sort of output housing to go in place of the transfer case. (never seen anything like this)
The easiest, somewhat bolt-in, off the shelf answer I can think of would be swap in transmission and transfer case from a 4wd truck. Not perfect, not space effecient but 
good excuse to go 4wd!
URI......hmmmmm......looks cool!
What would I want a 4wd Uri for? I could just buy a Hilux and have done...
Anyway - as far as output shafts being too long: we've got some pretty clever transmission people in Windhoek, and they can probably modify the output shaft easily enough.
The problem with swapping in a 4wd tranny complete with t-case: doesn't fit. Physically too big. Similarly, converting it to 4wd is not an option because there simply isn't anywhere I could route the front driveshaft and still have axle travel; the Uri is *narrow*.
What
might work is to use the 4wd version of the G52, and stick a reduction box on there...
Anyway: thanks all for the suggestions; keep 'em coming!
