Oh... that's a story. Back when Ohio still required a front plate, careful reading of the law told me they just required the numbers on the front of the vehicle, not an "official" plate. Like, you could just paint them on the bumper and it would meet the text of the law.
Anyway, a state trooper disagreed, and I got 2 tickets (from the same guy) over the span of 2 weeks before I could argue it in court. When I did get to court, the county magistrate agreed with the trooper, and I was going to appeal, but was moving at the time and missed my 30-day window. Might have been a moot point anyway, as they changed the text of the law the following year to explicitly require an official plate (I like to think because of me, but probably not)... and then in 2020 they got rid of the front plate requirement entirely.
I got it from German Plates back in 2015, and they have examples and a "your plate text" thingy to see what it'll look like.
https://www.germanplates.com/us-eurostyle-license-plate.html