This group in France made a silver R18, looks beautiful, better than stock, with subtle modifications: https://www.fcr-motorcycle.com/
And it looks like they have a great exhaust option and carbon fiber valve covers, reasonably priced:
https://fcr-accessoires.com/en/79-accessoires-bmw-r18
Hello. Bill from West Central Florida here. Long time BMW enthusiast, multiple R1200C owner, expert in the R1200C, also have R1200S, K1200S, have had R51/2, RnineT, K1200RS, R1150R. When the R18 was announced, I said yeah, will need one of those. Then I saw it and hated it!! What were they...