You can use an 1988 integra Distributor cap.
For the rotor you can use 1988 integra.
the zc is from a japanese crx/civic. I * heard* if the serial number is starting with a 5 is from a 2nd gen integra. If it starts with 2 its from a cr-x.. The harness will work just fine.
You can get the cap/rotor from your local parts store. Or go to honda an get them if you have alot of cash.
Hope you get it working
enjoy your zc