Tow hitch?

Anyone know where to pick up a hitch for a '70 Duster? I don't care if it is new or used. I would really prefer a Class II but even a Class I would get the job done. I just need to be able to pull a small 4x8 trailer to haul my dirt bikes around. I have only found a single Class I hitch but was hoping there were other options. Ebay has been no help.

Try putting this in the parts wanted section with the application in the title and you might get lucky.