Welded on receiver type hitch to the goose neck, and had the proper length to extend past the tire carrier and tire too!
All I had to find was a small size receiver bar, and a tiny hitch ball. The receiver bar needed has to be a dropped style, otherwise the trailer will ride too high if the ball is inline with the rear axle!
Now....to find a trailer, or maybe just hook up the garden tractor dump trailer
And, ball hitch was used back in the Model T days too, its authenic.....see this adv.