I had a 16/52 F&F that I think would be what you are looking for, it did have a deck but jus big enough for two seat bases. They are custom built in Arkansas and I believe will build to your specs.
My current boat Express XP200 is the same but in a 20 footer. I have 3 bases on the front deck but when I spin to the back I step into the bottom of the boat and not on the deck.