Caliper Brackets for a Dodge 8 3/4 rear end

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Does anyone know of a source for caliper brackets for a Dodge 8 3/4 rear end? When I bought my 67 Camaro it had this rear under it. It's got posi and a 3.42 gear so I left it. I had moser redrill the axles for Chevy bolt pattern. I pieced together rear disc brakes using bolt on circle track Afco caliper brackets for GM metric calipers, 79-81 Tran-Am rotors, and 85 Seville Calipers. I getting ready to plumb the brakes and I don't have alot of confidence in the Afco caliper brakets. They are for a 3" axle tube. The Dodge rear is 3" but gets bigger at the flange, so I had to modify the brackets to work.

Thanks for any info.