multi-band distortion processor
Basically it splits the input signals into 4 frequency bands, these go into fuzz circuits and vactrol based VCAs, then summed to the output or use the individual channel outputs. You can blend the clean/distorted signal and vary the fuzz characteristics.
http://nonlinearcircuits.blogspot.com.au/2015/02/multi-band-distortion-processor.html
Module is available as a DIY project only.
No info about availability.