Hello I am Ron Davis the webmaster for the GTCSregistry.com site. I have the production figures for the 2011 GT/CS. As for your build date this is located inside the drivers door on the blue data tag. The date is located at the very bottom of the sticker in this format. 1YYYYMMDDBBBB (Year, Month, Day & Blend #). If you register your car on my site you will receive a 15% discount on the certificate from Ford. You can also email me directly at: [email protected]