I bought mine on Craigslist. I searched using towbar, and tow bar. After searching a couple times over the period of a week or so, a guy about a mile from me advertised one! It was expensive, but there would be no freight involved, so I made arrangements to go see it. It was nothing special, so I offered half his asking price, and he took it!
1997 37' HR Endeavor, 275hp Cat, Freightliner
03 CR-V Blue Ox, Ready Brake