Most Jon boats of that length will have the extra seats, especially used ones.
And finding a used one with that beam width could pose a problem also.
I looked for a used 14’ open floor plan for months here in FL where there is no shortage of used Jon boats.
I ended up buying a new leftover Alweld bare boat from a dealer at a very good price.
Alweld does build the boat your looking for. It might pay to call them for a catalog and the name of the closest dealer.
Richard Genes boat is an Alweld, i believe 15x60 with the V front. But they make a square front also.