Junkyard rear axle swap ?

Is there an easy junkyard swap I can do on my Tahoe's rear axle
to get a limited slip and 3.73 gears with out having to buy and install
an expensive aftermarket one ?

Make and Models and Year to look for ?

Looks like some Chevy's came with the Auburn "G80" locking dif option ?
Just hunt around for a "G80" option axle ?

Any 2000-2006 full size half-ton SUV should change. G80's are really known for stregnth but it could last if taken care of. Pick-up axles won't work because of the leaf spring mounts.