No info about availability.
Dual Passive Low Pass Gate
this is a DIY Dual Passive Low Pass Gate made by me
the lower PLPG has an additional CV input which opens another capacitor circuit, but it doesn't work that well
Included in 1 Racks, 1 are public:
Takaab 2LPG 1U - Dual Passive Low Pass
Takaab 2LPG - Dual Passive Low Pass
Meng Qi Dual Passive LPG