Motorization of a Shaft
In industrial applications, the type of motor described is called an "outer-rotor" or "inside-out" motor. Brushless DC motors of that type used for model airplanes and small drones are called "out runners." Various manufacturers of industrial motors supply custom-designed stators and rotors to machine manufacturers for incorporation in driven equipment. It may be possible to purchase standard motors and modify them to fit your requirements, but that is likely to be very challenging. You may not find a standard motor that can be modified to suit your needs.