via this auction

Cosmetically & functionally perfect. Original lunchbox not included - this has been converted to a sweet 4U rackmount unit, custom-made to Metasonix's spec (and signed by the man himself! See pic's) kept in a clean, smoke-free space.
This is completely custom and is the only one ever produced as far as I'm aware.
Would fit wonderfully in a Buchla, or Serge rig that has an extra row. Its normal 19" rackmount size (84hp) so it fits in anywhere you need it.
If you're here, you probably know what this thing sounds like. It's a beast. Nothing else does what this thing can do. Consider pairing with your modular, to drive the VCO frequency, etc. It's a blast.
The last and final batch of the original Kv-100 sold out at instantly BigCityMusic for $2799.00
Comes with original power supply.
Specifications: Audio input accepts unbalanced guitar, microphone or line signals.
Output 600 ohms unbalanced.
1/4" jacks for all I/O.
Extra inputs: carrier audio input for ring modulator, CV inputs for VCO pitch and filter sweep.
Extra outputs: envelope CV out, VCO waveform out, pulser waveform out.
Frequency response: yes.
Distortion: yee-haw.
Filter sweep range: <100Hz to >12 kHz.
Uses Jameco 167151 AC adapter for power in 120v countries. Power inlet: 2.1mm coaxial jack. Unit ships with AC adapter for USA.