The only '69 Camaros with 15" wheels were Z/28s [std] and COPOs also equipped with #9737. Std COPO wheel was same as Camaro SS; 14" x 7".
Worthy of mention since at least one was built are non-Z/28s with JL8 4 wheel discs; 15" wheels included as 14s will not fit. The 2 track '69 Pace Cars were retrofitted with JL8 for some reason and also had 15s.
Yes, all of the Z11s on ebay with 15s are incorrect.