I pinged my contact at the GM Heritage Center just recently about Sales Brochures, which used to be accessible there, and she said that the site update was still in progress, and that that info that was available is still in the hopper to be included.
Meanwhile, if anyone needs a particular Sales Brochure, I may be able to dig it up using the Wayback Machine. It's kind of a pain, but is doable. PM me if you have a particular one that you want. They're complete brochures in PDF format that can be e-mailed.
