Anyone know where I can get my hands on 2 rear pre-cat O2 Simulators for a 97 Z28 LT1???

 

Don't you mean post cat? And i would just get a tune for what you pay for O2 sims this way you get a nice gain in power and you can tune out the codes for the O2's so it doesn't set the light anymore. But to answer your question Speed Inc has them.

 

x2 just get it tuned out.