If this is just a dumb idea, shoot me, lol. OK it you have a '99-'06 then you'll know what I'm talking about. You know the mesh grill that goes over the speaker? Rather than building a "pod" for it, would it work to just glass over that mesh to make a perfect mold? Then you could just cut that to fit the speakers you want in there. In my case I plan, or would like to fit a 6.5", 5.25", & 1" in each door. When I took the mesh piece off I could fit all 3 in that piece with no problems. Just an idea.