I just did a Google search and found a few.
This one looks pretty good in the picture, it is a real Z24:
Used 1987 Chevrolet Cavalier Z24 in Huntsville, Alabama Year: 1987 Mileage: 267000 Vin: 1G1JF11W4H7157277 Color: Black Body: Coupe Transmission: Automatic Engine: 6 Cyl Drive: FWD Fuel: Gasoline Zip: 35899 City: Huntsville State: AL
The price is pretty good too.
Here is one, that is not a real Z24, but I'd wager it will out run a lot of cars. Pretty expensive.
Rust free original Texas carBlack exteriorBlack cloth interiorFactory sunroofFactory cowl hood (87 only year in the square body to have)Atari instrument cluster3800 L67 engine (engine is a 2002 and ha
There is a website that can do a nation wide Craigslist search. I haven't used it in so long, I don't recall the name of the site. Google can find it though, most likely. Good luck and hope you find one you like.