were to find rear diff gears? 2003 tundra v8

[bulldog11267mad]

im looking for rear gear set for a 2003 tundra and cant find a place that has any. i am wanting something like 4.30. if you know of a place that would help alot.

 

[bustanutley]

tundra diff = 8.4/trussed 8" = taco non e-locker = T100 I have been unable to find stock ratios made by anyone other than toyota. Highest ratio availible after market is 4.56.