No info about availability.
Custom Waveform VCO
The Double Deka is a stable, wide range 1V/Octave VCO with incredible sonic versatility. Imagine "drawing" a 10 stage waveform using lighted front panel sliders. Now imagine two of these separate waveforms, each with a precisely stepped 6 octave range control that can also be externally voltage controlled. In addition, using a built in knob or external control voltage, you can cross-fade between the two waveforms. Add to this, two unique new types of sync, a funky digital ring modulator (DRM) type input, plus separate linear and exponential FM inputs, and you begin to see (and hear) the possibilities.
-from synthetic sound labs.
These merchants probably sell this module. Huh?