I know a firm that comes highly recommended by dealers who work with them. I forwarded your request to them.
The name of the company is Pro-Count 623-322-5150 Mike Bachara is the owner. They work out of Chicago and Phoenix.
Call Courtesy Chevy in Phoenix. Carl Barker, Pts Mgr (602) 604-3001.
I know these contacts as I work for a firm that provides OE Parts Catalogs and SEM/SEO marketing for parts depts.
Craig, they contacted me.
Thanks for the information.