As far as I know creative supplied assembled nosecones to clairpoint, they did not install them. Fenders were installed on the line, before clairpoint.
The only time any "Superbird" (An actual 69 RR was used as the "buck") was at Creative Industries was initial mock up/prototype work
That would be a great tribute car to build. The 69 RR/Superbird Design exercise car. Even better if the original was dug up.