I have an extra trailer wiring adapter. It will go from the four flat connection on your vehicle to the seven round that is needed for many trailers. The three wires that aren't being converted are dangling loose for you to hook up or stow (depending if you want brake and charging capabilities).
It is brand new and unused. It came in a kit from etrailer.com but I already had one. Note that this is the adapter subaru owners (and others, to be sure) need.
Email an offer, I'll probably accept.
sickmiller AT gmail