No info about availability.
Ext. Input / Envelope Follower
a modified version to give an input to the comparator (threshold + gate out) for use with external signals, rather than just the Env Follow signal. Mod described at www.niroke.blogspot.com
These merchants probably sell this module. Huh?
Avid Digidesign C24 Controller
TC Helicon VoiceTone Correct
Boss HM-2 Heavy Metal (Black Label)
Lectrosonics DCR822 + 2x DBSMD Digital
Studiologic SL Mixface Control Surface
Boss DM-100 Delay Machine