Getrag 440/446 parts.
Here is a link the parts thread. Give either Kormex a call for a used but still perfectly good VCU or give AutoCraft a call for a brand new but more expencive one. Their contact info is on the first post of the thread. I believe that thread has a link the "Everything you need to know about your AWD drive train" thread/wiki also. Again just read the first post.
I would HIGHLY recommend against the RWD convertion. The 5 speed TCs will break very fast that way. (Read the "Everything you need to know about your AWD drive train" thread/wiki for the reason.) If you wanted to save money you could weld the VCU and the planetary gears and have a solid center diff. Doing so will give you more traction off the line when you increase your power.
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When asked what the best thing to come out of Italy is, most Italians will tell you Ferrari.... But if you ask me it was Super Mario Brothers. 
250 RWHP
If you want the exploded views of both 5 and 6 speeds or pics e-mail me at
SavagTiger@AOL.com.
94 VR-4 Panama Green Tan Interior
RPS II, gutted cats, flipped BPV, 3SX control arms, 3SX shift bushings, Red Line, Auto-Meter. Rebuilt TC, transaxle, steering rack, heads, and turbos. 360cc's blue printened with in 1%. New short block. RWD convertion and welded rear end.