I have done so many crowns! For years I saved all the moulds, hoping that one day I could reuse one. I never did. I threw most of them out when I downsized my studio a few years ago. These days, I would just draw one in CAD and get whatever size I needed cut CNC.
If I had just known where this sort of work was going, perhaps I would have simply fudged some of this detail. When I found the plaque online, it appears to be on a giant sign in the middle of a field.