By Bass Drum "skins" I trust you mean the playing surfaces? I haven't
looked into having those made up... however seeing as the SDX BD is
essentially an SDS9 Pad with a grey playing surface, I was always of
the opinion that one might "paint" the black playing surface with a
rubber based grey paint that would adhere to the surface.. but I never
tried it so I don't know how it would hold up or look....
To be clear, it's the Bass Drum SHELLS that I was referring to... not the playing surfaces.