I’m not sure whether 13 needs its own sprite, but 7, 9, 10, and 11 really should have sprites since there are Stone Doors of those numbers, and it’s a little awkward to see a plain number sprite on a world map door
See what I mean by forgotten! I suspect stone doors will need keyhole counts of a maximum somewhere around 24 when the final version comes out. Unless more key types emerge, but I don't think so.