I ended up buying a 3 foot 7 pin extension from ebay and that worked well. BUT, a far better solution would be to mount the socket on the back bumper and splice in extension wires which I'll get to one of these days when I'm not feeling too lazy on a weekend
Even without trying to hook up a trailer, the location of the socket is bad and I've dragged it through the dirt off-roading more than once :/