Same here made my own from small car hitch(cut it down to fit)
Made my own wiring patch also since I needed it right away to go to maintenance day last year or I would have bought them from the members on sight.
Also dealer wouldn't install because of liability issues .
Usually takes 1/2 hour to remove saddle bags,hitch and disconnect harness then put in original spacer so I can take in for dealer service then change back when I get it home.
They know I tow a trailer as I showed up a few times with bike I traded in(2000 Road-star) to buy 2012 Venture.