I've been searching around trying to figure out what transfer case to couple to the NV4500 when I ran across this link. I thought I would post it because it seemed to have alot of useful information in it.
http://www.4wheeloffroad.com/techarticles/buying_a_used_junkyard_transfer_case/index.html
http://www.4wheeloffroad.com/techarticles/buying_a_used_junkyard_transfer_case/index.html