Switch caps

Does anybody know if the black and white switch caps and slider caps of the S6 are standard parts and where I could get replacements for them? I want caps in different colors to personalize my black S6. Maybe with purple/blue/yellowish buttons like the Jupiter 6.

Salecom SP86 series. There are other manufacturers that make them that are compatible, but Salecom seem to have the best surface finish and switch action

All fader and rotary caps are custom made by UDO