I'm not sure how much help they'd be, but I've seen pics of 2wd trannys on eBay.
Can't help you on the tailshaft question. When I found out the 3L30 was used on cars like the Chevette, I searched eBay for Chevette transmissions and saw a few (very cheap), but couldn't tell and couldn't find out if I could pull the tailshaft and bolt on the transfer case.
Sorry, not much help here :-/