You could try Stu at
www.spareshack.com, it may be felix says they haven't made any yet, although i wouldn't think they would be different to the standard S4R Termi system. Or it could be just out of stock at the factory, i'm waiting for some Termi slip ons for my old M600, they are out of stock of these at the factory and can't give any indication when they will be availiable again, the Italian way for you i suppose?????