No info about availability.
Korg Volca - Eurorack Mod
simple Korg Volca "Beats" to Eurorack Mod and five 3,5mm Outputs for Tom, Hat, PCM, Tom+Snare, Tom+Snare+Kick to patch it in your Modular System (VCF,VCA whatever) !
The Korg Volca series works with a universal AC/DC 9v/1800ma Power supply / adapter !
http://www.korg.de/produkte/synthesizer/volcabeats-produktinfo/volcabeats-produktinfo-1.html