Hi Sundragon, you could start a forum poll to see who is interested in a 5 string Jazz bass. If you get 5 or more people keen then Ads may be able to place an order.
Otherwise send Ads and email for a cost of a custom 5 string JB.
Looking at your graph Ibanez are the most popular shape.
Really all you need is a JB-4 body with wider pups/cavities, wider neck, 5 string bridge and an extra tuner and B string.
Are the big F ones a 4 + 1 tuner configuration ?