A: You can get an "O" ring from any good plumb store.
This bracket is held on by screws, depending on the age of your shower this will either be a Torx T10 or if it is under 3 years old it will be T15. We do not stock them but any good diy store or tool merchants will have them.
I would also check the area behind the bracket as this may be damaged and the shower beyond repair.
Answered 253 days ago | Barrie