I recently purchased a 1980 Z28 Camaro to restore, and wanted to purchase an original sales brochure on this car. After searching the web, I finally found a place that has them. I just received it in the mail and was VERY satisfied with it.(lots of info on my car-when new)
I found it at www.crazyjerry.com (http://www.crazyjerry.com) if anyone else has had a hard time finding this.

i got the original big full color one from someone here for 5 bux, and the original owners manual off ebay for 3.50

I also purchased the owners manual off of ebay, but could not find the brochure.I paid more than $5 for it but at least I have one now.