Found this website and ordered a few OEM parts (sprockets and bolts etc.) at a reasonable price I think, was cheaper than two Motorrad dealers I got quotes from.
They seem to have everything in stock too.
BMW S1000RR 2018 Moto - All categories (fixparts-online.co.uk)
They seem to have everything in stock too.
BMW S1000RR 2018 Moto - All categories (fixparts-online.co.uk)