3 input VCA based on the VCA3+ design by Rene Schmitz
Cat Girl Synth's CGS54 VCA 3+ built by Lower West Side Studio
The CGS64 Voltage Controlled Amplifier from Cat Girl Synthesizers is based on the VCA3+ design by Rene Schmitz.
The CGS64 supports 3 inputs each with its own level control
The CGS64 VCA3+ comes in a 2U width with 1″ (25.4mm) knobs controlling 5 potentiometers; 3 Input Levels, Initial CV Gain and CV Level
https://richsstudioproject.wpcomstaging.com/product/cgs64-voltage-controlled-amplifier/
These merchants probably sell this module. Huh?