never done this, but after doing a rear deck sub i think i have an idea...
just build a platform out of wood or w/e you want, and mount your amp to it. then get some bolts, drill a few holes into the deck and a few into the platform, and suspend the platform from the deck (by puttingthe bolts through the rear deck and into the platform)...just make sure you have some space in between the top of the amp and the rear deck. you could use nylon locknuts at the bottom to make sure it wont come loose. does this help?
damn...now that ive written all of this, i kind of want to do this
