You may be able to find an AX15 or NV3350 in 2WD form, that would require less to convert it form a 4WD tranny. But I wouldn't waste my time on one. Go for a TKO500/600 or a T56.
I have it on the road now, but with a 904 auto. Orignaly it was a 3 speed stick and I would love to put a stick in it again. I will look into these other trannys thanks for the input.