This Pedal is currently available.
Variable harmonic distortion
The Ampeg VH-140C Solid State Amplifier was a staple of the 1990's Hardcore and Death metal genres. Long since out of production, the VH (variable harmonic) line of amplifiers produced still sought after heavy distortion tones.
S&K pedals has taken the distortion channel directly from the VH amplifiers, pedalized it and powered it with a pedal board friendly 9v supply. Controls include: Level, High, UltraMid, Low and Gain.
The VHD can be run one of three ways.
1) into the front end of your amplifier like a typical distortion pedal
2) into the series effects loop return, bypassing the preamp
3) into a power amp or slave amp (i.e. a sunn concert slave)
https://www.snkpedals.com/product/vhd-distortion-preamp-silver