I don't have one for sale, but I wanted to let you know that a 2008-2013 will all fit your car. I picked up a 2008 OEM subbox and check the fit on my 2013 SEL and it fits just fine. I found mine on ebay.
Dingo...Sounds like you have a mass of knowledge with the Edge. Just bought a 2013 and I'm looking to replace the stock Sub. Do you happen to know the mounting depth? Looking for a sub to fit inside the stock woofer enclosure without to much modification.