72 Swinger disc kit availability.

Hey all, I have a 72 Swinger,318 auto, A/C, PS, 10" drum brakes. 14"x 4" Rally's, w/ 3.75" backspacing. Does anyone know of a front Disc conversion kit that will work with the wheels I have? Got a no go from a few sources, and asking the A-Body peeps for any insight. Thanks.