A Metal Corner Bracket?

Hi i am new…I just recently got the Battery Doorbell Pro and the Chime Pro.My question is would there be a Metal Corner Bracket that I could buy possibly?The reason I asked this is when I put the bracket on the brick wall near my door I noticed that bracket bent a little so that means when I put the ring doorbell pro on the bracket it wasnt flush there was gaps on the top and bottom. Worried that water might get behind it.I really hope there is a Metal Corner Bracket.Thank you inadvance for any help or advice.Signed;James Barrek