Anyone know if it's possible to swap out the factory bose subwoofer with a direct replacement? Stereo shop guys went off on some tangent about adding new subs into the floor under the rear seats etc. The word that scares me is "could be trickey." Translation $$$$$$$. Don't really want to change much, but I'd like to add some punch to the low end. The absolute no-no is that the bed and mid-gate must function exactly as the factory made it. I'd love to put in a ton of bass, but the reason I got the EXT was for the function of the bed.

Just looking for something to swap out the factory sub.