Module is available as a DIY project only.
No info about availability.
Serge Variable Resonance filter (VCFQ)
https://www.modulargrid.net/e/random-source-variable-q-vcf
The Serge Extended Variable Resonance filter (VCFQ) is probably the most famous filter of the Serge system and one of the essential Serge modules. It is an excellent, extremely versatile general-purpose VCF that provides simultaneous low-pass, high-pass, band-pass and notch (band-reject) outputs combined with unique flexibility. Its trigger in, LOW mode and self osciallation allow a variety of uses from Oscillator to VC processing.
Some details of the Random*Source Serge VCFQ module kit:
Under licence from Serge Tcherepnin
Designed for High-end VCAs (THAT2180)
No matching of transistors required
No wiring needed
Eurorack format (3U), 14 hp
Power consumption: 52mA @ +12V, 52mA @ -12V
Module depth: < 40mm (1.5")
These merchants probably sell this module. Huh?