This Filter is based on the SSM2044 chip, that for used for Synths like the Korg Polysix, Korg MonoPoly, PPG Wave 2.3 and others.

Control for CUTOFF FREQ of lowpass filter
Control for RESONANCE of lowpass filter
Audio input with attenuator
1 CV input for CUTOFF FREQ with attenuator
1 CV input for CUTOFF FREQ 1V/Oct
1 CV input for RESONANCE
Output
SSM2044 chip
3mm face plate
Mounting depth 50mm
Dimensions: 5U single width; compatible with Moon Modular, synthesizers.com, Club of the Knobs, ...
Power requirements: +/-15V

• ? mA +15V
• ? mA -15V
• ? mA 5V

No info about availability.