2 wave digital oscillator
The EMW MIDI Oscillator is a digital oscillator based on the EMW WCS-1 synthesizer. It responds directly to MIDI signals (C1 to C6) and generates 3 waveforms: Sawtooth, Square, and Sub-oscillator.
The sub-oscillator waveform is not a simple square wave. it has it's own unique shape and sound characteristic, ideally designed to be mixed with the another waveforms.
http://www.electronicmusicworks.com/eurorack/midi-oscillator-55.html
No info about availability.
$92