No info about availability.
Cyborg Dual Passive Half Wave Rectifier
The Dual Passive Half Wave Rectifier takes a waveform input and produces the positive and negative portions on seperate outputs. There is also a through jack duplicating the input. Since The module is completely passive and bi-directional, it may be used to combine the positive and negative portions of any two unrelated waveforms and combine them into something new. Comes with two independent channels.