Could something like this be doctored to make the base control hot and cold, and the final off and on at the tap head? Or am I a dreamer?
http://www.build.com/danze-d205057-...-filler-from-the-opulence-collection/p1033226
http://www.build.com/danze-d205057-...-filler-from-the-opulence-collection/p1033226