I think the issue you will run into is that the panel from Ford also includes the round faux gas cap as part of it, so you will be missing that piece and I think that will leave some holes in your trunk lid. I have a 2010 that came without the trim. If you're serious about taking off that panel, I'd be happy to trade you my non-panel GT rear faux cap in exchange for yours with the panel, it is a look I want for my car, and won't leave yours with holes.
Rob