I realize you want the complete assembled 3rd member to just swap & return the core but
http://trdparts4u.com/
Has the TRD LSD unit for $199 shipped
You are better off buying this and bringing your 3rd member to a shop to do the swap if you don't want to do it yourself.
I bought one for my Brother's truck- Its relatively straight forward IF you are not regearing- Had the Lsd unit in the 3rd member within 3 hours from starting.
No adjustment of carrier shims was necessary. We didn't even have to heat up the ring gear to get it on the LSD.