….when it comes to brakes, shimano have trouble offering spare parts for current stuff never mind old products! 😆 Unless you consider a whole lever/reservoir and entire caliper assembly to be spare ‘parts’.
As an aside, I wonder how many pedals, wheels and hubs are lying abandoned beacause spares are not available via that brand, but would be available if you knew which other brands the same taiwanese manufacturer made the hub/pedal in question for. It would be nice to have a bit of transparency so if you couldn’t find spares for hub X, you could look for spares for hub Y instead.