While we're on the topic of dodgy accessories, I'll add parts. Have had my eyes peeled for some Brembo radial brake and clutch masters, and the majority of stuff for sale is fake. Like this:
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There are a few tells besides the sloppy casting, but the biggest one I can see for the RCS19's is that Brembo casts their logo into the recessed bit above where it says RCS on the main body, while the fakes have it stamped in white.
I couldn't figure out why I got a hologram authenticity card with the Brembo stuff I bought from CarpiMoto a couple years ago, but I know now...