Airone 250 - parts help required

Hi, anyone know where in I can get this part of the crankshaft oil ring M2055 in the parts manual for an Airone 250.
It’s 56mm od and 25mm Id?
Thanks

posted on behalf of @Jef_Walker

Mr Walker has had various replies with great details on the FB forum and on the guzzi singles list on where he can source them
Does he not read the replies?

no idea, and not really relevant here. if you are able to provide the answer, please feel free to do so. thank you.