larger rear brake rotors

[pagosa dsm]

I just finished mounting cobra calipers with crown vic rotors on the front.I would like to fabb some 11" rotors on the rear with stock calipers.Does anyone know an auto manufacture rotor that will interchange with a 1st gen. I can make hub rings and redrill the wheel studs.I am also plan on installing an adjustable proportion valve .
thank for any help Rick

 

[pagosa dsm]

I just orded Napa part # 86762.
diameter 11.42"
height 2.110"
thickness .395
center hole dia 2.64 or 67 mm
lets see what happens