KEEP the stock look dred, or do a center console like ^^^
Its more impressive IMO to have music that is not seen and still sounds good. I was told by some vendors that it cant be done but I fit a 10" Premier behind the backseat of my dad's old model L200 in a fiberglass enclosure and the seat locks (anyone who had experience with these vehicles should know what little clearance you have back there). I am almost sure you have more space in the frontier. Check SR he go sort you out, or one of the other willing installers... or try a thing yourself.
There's no point in loosing your entire back seat.