Does anyone know know where I can find #6 speedmaster extension Boxes ?? I’ve had this ad in the wanted section for 1-1/2 years with no answers . I’ve found 3-4-and 5 boxes . but no #6 boxes . New or used is ok !! . Looking to put them on a 47’ Fountain .

I have a new set with hardware
we’re mounted on boat then removed never in water
4,000$ for pair complete
586-630-6552 John
zip 48047