They came from the factory on the fronts. I installed these over the paint on the 2 rear doors.
PN 91114 by Auto Ventshade (they're for 2004-2008 screws, but these worked for me on my 2010)
You can get them here, although the pic doesn't look like mine but mine are the same AVS part number
as this site shows: http://www.stylintrucks.com/parts.as...tfamilyid=2094
These seem a little more heavy duty than the factory ones on the front doors that cover the paint.