Where can I buy a new metal lens mount ring?

Does anyone know where you can get a spare metal lens mount ring?

Mine is bent out of shape after falling with a telephoto attached...

I tried on the internet but with no luck and it would be a pity having to purchase another entire camera (even if a broken one for scraps).

By the way I have to service a OM-D EM-5 Mk II, am I right in hoping that the metal ring is the same across all Olympus m43 cameras, or am I being naive?