If you could see the condition of the front one (which sheared) you might consider the same John The mounting plates/brackets are already stainless - wonder if replaced by a previous owner, I doubt they were factory fit (but I could be wrong)...
Graham (G4FUJ)
Sold L44FOR 4/4 Giallo Fly '11 MINI Countryman Cooper D All4 '90 LR 90 SW