Just in case you did not see this under Machined Costing, here are the Sheet Metal Costing Tempaltes and part that work with the SW2012 What's New help on Sheet Metal Costing.

There are 2 new sample sheet metal costing templates - 1 mainly for waterjet and 1 for laser.  Also, the sheet metal part.

You will have to either install the sample templates at "...installation directory\SolidWorks Corp\SolidWorks\lang\english\Costing templates" or use "Tools>Options>File Locations>Costing Templates" and add a new path to the folderwhere you have save the files locally.