I am pleased to present, the Sylph Winnower: It's been a while coming, but the first (to my knowledge) consumer sized winnower is now available (at least at a not unreasonable price and with a reasonable efficiency and through put).
What you see there is how it comes. You need to supply a cracker (Champion or Cocoa mill) and vacuum. But I know many of you have these already. I hope that brings a sigh of relief to a number of you who have been winnowing by hand all these years.