Thanks for the idea. My JL amp manual says not to mount them upside down there. I will be using rear speakers for fill too. Soooo....not an option.
I found this
by searching Google images - that's close to what I'm after, but not quite. (Don't want the amps to show).
2013 Premium V6/Auto, Pony Package, Ingot Silver, JLT CAI & Bama 93P Tune.