Here's a 52mm one with a bracket included

https://www.aliexpress.com/item/3234...archweb201603_

And - here a whole page of 57mm ones but they incude a bracket anyway

https://www.aliexpress.com/af/57mm-d...20210508155638

And - here are the brushless ones

https://www.aliexpress.com/af/57mm-b...tiative_id=SB_