hub motor clutch failure

hi i have a pro rider ebike , ive covered 4000 miles and the clutch has failed , does anyone know where i might source the same size clutch without having to buy the whole motor. the numbers on it are as follows DLK 072-57-11. any help would be really appreciated, picture attached

the bafang swxh motor has clutch of exactly the same size as this but its freewheel is opposite direction so it wont do. so it looks like i have to replace the motor