wow you guys really pay alot for a locker for these things. I just dont see paying that kinda money for a drop in style locker. In my opinion you would be money ahead to swap the entire axle to something stronger that already has a locker available for it.

It will cost a lot more than $600 to do that for the rear. You would have to regear what ever axle you find. Gears (If you can find the ratio)and setting them up will run way more than $600.