trd part numbers

this is gonna seem like a strange question. is there anywhere where you could find the trd part numbers for specific parts? in my case, i wanted to cross reference trd brake calipers. i wanted to see if toyota uses these calipers for more than one application. i recently scored a set of trd bbk for my new daily driver (xb) and it looks awfully similar to the xrunner bbk. if that far, why not the tacoma bbk? my guess is probably the same caliper for the tc, xb, and MAYBE xr. the tacoma one might be the same for the tundra. yeah weird question, i know lol. if you guys have that info, i appreciate it.

EDIT: sorry to be more clear, i didnt mean the whole bbk, just the caliper itself. for all i know, you cant order just one caliper.

 

perhaps this site might help: http://toyota-usa.epc-data.com/