You know you're running out of mods to carry out when you're reduced to swapping out individual bolts! (On the plus side, it's way cheaper than a set of carbon wheels!)
Anyway, I've just come across this fastener supplier that I thought I'd share, as they might be useful to someone.
They're called GWR Fasteners
https://www.gwr-fasteners.co.uk/ and their USP is that they can supply stainless fasteners in a variety of colours.
I only bought a single screw for the exhaust bracket but I was very impressed by the quality of the finish - very deep black, very smooth and very glossy.
I've replaced various screws in the past with blackened stainless versions but those have had a rather industrial finish similar to gun blue and not comparable with black anodised aluminium.
These, however, are like the best anodising, only in stainless (no purple option though!). I'm not sure how resilient the finish is, as the blurb says the fasteners are not designed for frequent assembly/disassembly. Still, probably no worse than anodising.
Standard black stainless (left); GWR black (right)
Anyway, if you need coloured stainless, then this stuff seems excellent quality. (Maybe the copper would go nicely with buzzer's orange paintwork?!
)