where can i get a factory rear locker for a tacoma?

i am currently searching local junkyards for a factory locker with no luck thus far. i cannot seem to find a way to find junkyards online, so a phone book has been my only friend in this matter.
i was hoping maybe someone could help me out with any or all of these probs. i would really like to find one of these lockers because of there full selectability. an ARB air locker would be about as expensive it would seem but i just seem to be hooked on the factory one. <IMG SRC="smilies/smile.gif" border="0">
THANKS IN ADVANCE
Brent

97 tacoma
2.7l
6inches of lift
33inch mud kings
4.10 gears