S197 Mustang Pedestal Rear Spoiler: Wicker Bill / Gurney Flap

[_E85]

Does anyone know of a company that makes a Gurney Flap for the "pedestal" rear spoiler? I have a 2011 GT and it has the pedestal rear spoiler option; believe it is the same spoiler used on the 11-14 CS and 12-13 BOSS 302.