I just got some "free" resto info from GM.
The first book, about 150 pages, is titled " 1969 Chevrolet Camaro". It has alot of info on this year that I hadn't found in other books. Most of it was AMA documents, build details, and notices.
The other book is "Chevrolet - Hobby & Sales Group", is 47 pages. It has lists of GM restoration parts and accessories Licesees and the products they make for the whole US.
It has everything from cams to weather strip to T3 headlights. It also has national listings for specialty shops, clubs, and sanctioning bodies.
I got this info from the Chevrolet Customer Assistance Center. The number I called was 1-800-222-1020, and work thru the computer to a human customer assistant.
I hope this info will be of some help to others.