Is there a diagram of the the 2012 seats? I am searching for a drivers side left seat valence. I have not found a drawing to allow a verification of the part number.

 

Welcome to the site..
A diagram showing the seat components shouldn't be a problem. But, the part itself generally doesn't carry the specific part number for ordering etc. Your local Ford store should be able to provide you the number, we can provide you a illustration if that would help..