Joe helped me find my wheels, those are the sunburst wheels from Grandt Line. Got mine in bulk before they closed. That's also where the regular spoked wheels came from.
I have no plans to make a popcorn wagon though!
Joe ended up in an interesting spot when Ringling Bros. closed because of the licensing issue, that's why you'll see MT using the wagon castings for about everything but a Ringling circus wagon.
Frankly that one looks more like an etch job.