Does anyone know the exact measurments of the stock sub area so I could get a box made? Or does someone know of the size of box that would fit? I am having a box made for either that, or a circular one for the spare tire area. I'm just not sure how I would mount that one. Here's the link to the one I was looking at.. http://cgi.ebay.com/ws/ebayISAPI.dll...tem=3092088294 Otherwise just the stock dimensions would be great.. thanks