What is the ribbon cable pin count?

I want to hack this controller for a 8 inch wide tablet, but the existing ribbon cable assures I cannot do it stock. The rubber flex back strap and spring combo (versus telescoping hard plastic) gives me hope that if I get a longer ribbon cable, I could also fashion a longer strap. I can't tell from the photos of it's a 14 or 15 pin. Also, what is the current length of the ribbon cable so I can figure out the size I will need for my tablet? Please inform. Thanks!