Greg,
I hate to be the one to break the news to you, but original KT-66´s, as used in the famous Quad II´s, are about as rare as the Thorens reference TT.
I believe equivalents are available from various sources ( the russian 5881 being one of them ), and I seem to recall reading a couple of years ago Golden Dragon were about to put a new KT-66 on the market. Haven´t heard anything about that since then, though.
Jorge