I'm looking at putting together my own custom controller that's going to very potentiometer heavy. I'd like to use chroma caps. The issue is that the spec for chroma caps says that they fit on 6.5mm D shaft pots but having looked around Mouser, CPC Farnell and Digikey 6.5mm pots don't seem to exist, only 6.35mm. Is there an error in the spec, a conversion from Imperial units or can someone point me to somewhere that stocks 6.5mm pots.

Many thanks,