Take a look at Dan’s site.
http://www.leechboats.com/sail/leech-ok-dinghy
Mark McNamara, owner, will be happy to take your Ovington OK Dinghy order.
https://www.kosailing.com
Lead times might be an issue, but Bo Williams, sales manager at Zim can order you an OK Dinghy
http://www.zimsailing.com
Example of hull numbers as specified by USOKDRA. 4 inches tall; pennants pointing to the bow.
https://www.sail-world.com/news/218296/New-study-by-Yachting-NZ-is-very-revealing?fbclid=IwAR0hHn–xNqq0ynOfz8q814M_hD-hBJ3JnCspLSpeTaiCxI8zrrYZiLi8IA