Here are some useful links for Clothing, Accessories and Collectibles:
camaroperformers.com
Magazine featuring just Camaros
carsinbarns.com
Dedicated to all those cars found along the roads, behind barns, in barns or whever their owners left them
gmhightechperformance.com
Magazine featuring Camaros and other GM vehicles
yenko.net
67, 68 and 69 Yenko Camaro VIN list