Suzuki: Toyota Tacoma Differential Gear Change, tacoma prerunner, differential gear

Question
Have an '01 Tacoma Prerunner w/a 410 diff. Would like to change it to 3.42 ratio. Can anyone tell me where I can find this ring & pinion set? And what if any problems would one encounter. This would be to get improved mileage on mostly highway use. Thank you.

Answer
Huh???  Toyota Tacoma???
I'm not quite sure why you asked ME, given that my field of expertise is Suzuki Samurai, but some of the sites on the links at izook dot com do have parts for other brands.  Try them, I suspect you will be able to get some ideas.
scotty