The cheapest would be to get it from a taco as these are the most common. People always want more for the tundra just because it's a tundra even thuogh its the same. There is a guy on my local craigs list selling a tacoma diff with a factory limited slip for 275$. It has been on there forever and I have been thinking of calling him an offering him 200$ even though I have no use for it. It would be perfect for a front axle running stock birfs.
