A Bullet HollowPoint 770NEO 7.7" HLCD will mount right up to the 07 & up tower pads with the existing flange and no need for an adapter. These are in really nice domestic spun aluminum pods.
Exile has an adapter that will facilitate their own speakers which includes a 6.5" surf coaxial, 6.5" HLCD and an 8" HLCD.
Wetsounds has an adapter that will facilitate their own speakers which includes an 8" surf coaxial, 8" HLCD and 10" HLCD.
Either the Exile or Wetsounds will provide a swivel mount that quick-disconnects.
There's seven speaker choices.