I've confirmed the existence of at least four, 1968 Dick Harrell Super Chevelle's as of this post.
I located the Fathom Blue car last summer.
https://www.motortrend.com/features/...olet-chevelle/
That makes, Tripoli Turquoise, Fathom Blue, Ash Gold, Matador Red.
I've also successfully found the earliest known owner of the Ash Gold car.