I did the same mount on the same trailer but had to remove it and mount it to the front because it sticks out past the trailer tire and you can easily misjudge it and hit someone or something.
The tire came from Tractor Supply (same place as the trailer) and the mount came from Amazon.com. Thanks for watching. www.amazon.com/gp/product/B073WP3GC9/ref=ppx_yo_dt_b_search_asin_title?ie=UTF8&psc=1