8.75 disc brake conversion kit without parking brake

Does anyone know of a conversion kit that comes with calipers without a built in parking brake? And fits in a 14" steel wheel. We are converting the '57 DeSoto over to disc brakes all around. These cars had the parking brake on the driveshaft. I want to keep the factory parking brake. So I need to find a kit that fits in a 14" wheel and doesn't have a parking brake built into the caliper.