I found one in a remote junkyard in South-western Idaho for 750. Best place is the small farm towns where they don't do much 4x4-ing Here is another place to look for one:
http://www.car-part.com/
The Bellhouse from Advanced adapters and the tranny-transfer adapter are going to be costly but I figure they will be worth it in the long run. Lower RPM, less engine strain and better gas mileage. I drive a 5sp Jeep Rubicon most of the time, but in my truck I'm always wanting that next gear.
http://www.off-road.com/products/sho...adapt-show.htm
I'm building on a budget, this years mods are power steering and disk front 44 with power brakes.
The member that built the setup that went into ryanroo's truck is "kwmech"