ZC engine/rotor questions

How's everyone? I was just wondering where to purchase internals for the DOHC Zc engine, or where to find a cross reference chart for parts. I want to get some cams, cam gears and build the head with new springs and shit but I dunno where to get them. Any help would be greatly apprecaited. Also I purcahse a set of Hp Racing performace Rotors from NOPI, the $450 dollar set with the steel briaded lines and shit, but they're for 92-95 civic. Will these fit a 91 hatch si? They're pretty large, I think 15 inches or so. And lastly, is the master cylinder on 90-91 CRx si the same as a si hatch? Thanks :thefinger