Ya holley and edelbrock sell replacement throttle bodies. this guy knows his sh*t.
Brians 1991 RS

 

If you can (and it's not too long of a wait) You may wanna get the cam and all the stuff to go with it and do it at the same time as the new intake and TBI unit. Especially since you've gotta pull the intake to get to the cam anyway.

 

i would, but this is my daily driver, so im not lookin to go TOOO radical yet. From how it performs it seems like it has a mild cam in it already. But im not sure. Im gona go with a 4 bbl maifold and im gona look for a bigger throttle body, maybe even a 4-bbl throttle body.