Neuron / Difference Rectifier (Modular Addict Panel)
Neuron / Difference-rectifier: New version 8HP panel with PCB-mounted sockets. Easy build, no wiring, all thru-hole components
http://nonlinearcircuits.blogspot.com/2014/07/8hp-eurorack-neuron-diff-rectifier.html
http://modularaddict.com/manufacturer/nonlinear-circuits/nlc-neuron-panel.html
Module is available as a DIY project only.
No info about availability.