It looks like the license plate lamps changed on the late 2006 - 2007 bumper. I just received my Gen2 bumper w/o tire carrier and the hole on the metal bracket shipped w/ the bumper for the license plate lamp is too small. Either going to have to enlarge the hole, get the older model plastic pieces, or find an aftermkt lamp to fit.
Jim @ Shrockworks said there isn't much he can do for now as I am the 1st they've encountered to have this newer license plate lamp.

Gen2 pre 2006 below