Buchla Timbre
This is basically a clone of the Buchla timbre found in the Easel. I have added a simple tri2sine converter input, along with the regular input, and buffered output. The panel looks dark blue when mounted in a case.
http://nonlinearcircuits.blogspot.com.au/2015/04/timbre-generator.html
Module is available as a DIY project only.
No info about availability.
$38