This Module is currently available.
Transistor Ladder 24db VCF
The VCF24db is a fat sounding transistor-ladder low-pass. Special features include automatic gain correction and a beefy distortion circuit. The module can self-oscillate. While doing so, it is possible to play it like an oscillator. Furthermore, there are individual outputs for audio material filtered with an edge steepness of -6 dB, -12 dB, -18 dB and -24 dB per octave. A fifth output can be switched between the slopes mentioned. One of two inputs is adjustable in level. Cutoff frequency and resonance parameters come equipped with CV inputs plus attenuators.
http://www.grpsynthesizer.it/index.php/it/prodotti-it/eurorack-grp-it/eurorack-grp-vcf-24db-it.html
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These merchants probably sell this module. Huh?