Interesting list from Musclecarclub.com. As for the 69 ZL1 Vettes only 2 were made and one is in the Seattle area. Owner has a nice collection of all makes/types of cars to including other COPO Chevelles/Camaros and Hemis and just aquired 2 Shelbys. I will be taking a tour of his collection in Aug during the All Chevy Show.
http://www.corvettes-musclecars.com/home.shtm