I don't know why, but I haven't found an after market light yet that fits like the OEM lights, even my $300 rocket lights left a gap all the way round the recess. If you look real carefully, you'll see that I added a chrome strip around the rockets to fill in the gap.
I've had after market Red/White (like the 06/07 tail lights). I've also had the IPCW LED lights like you have and I've had two different APC tail lights and NONE of them fit properly.
