No info about availability.
2U format mixer with 3U adapter plates.
An recreation of the Moog CP3 Mixer with discrete matched transistors and the click filter. The module is 2U Eurorack format and designed to fit in the Aion Modular 8U case. Supplied with adapter plates to increase the size to 3U.
These merchants probably sell this module. Huh?
Aion Modular CP3 3U Mounting Adapter
Aion Modular CP3 Mixer