a 5spd from a 96-03ish tacoma/4runner will work too, youll just need a pass drop transfer case. check if a 88-95 3.0V6 transfer case will fit to a taco/4runner r150f. if so making that work would be easier. t100s arent plentiful
With that being said, I can get a 98 t100 R150f for $350 in town which is nice. I don't see why my current one won't work if they are both t100 transmissions you know? It would make sense if my current tcase is compatible with a auto and 5 speed. Would make me save money if I can keep my current one instead of having to buy one that works with a 98 t100 r150f