If you don't have manual hubs I'm sorry, I feel for ya. And last I checked it's not worth the @ $1,000 to convert them over....tisk tisk, when people started giving the sales guys too much lip about being too lazy to turn a dial.......oh well.
Too bad Toyota isn't up to making good'ol fashioned plane ol' trucks anymore.
MAYBE if your lucky you can get some salvage manuals but even then Toyota prolly did something to make that easy swap impossible.
Did some quick googling for you
4x4Wire - Off Road Solutions Manual Hub Conversion Kit
tacoma Manual hub conversion - Off-Road Forums & Discussion Groups
Downey Off-Road