This Module is currently available.
6-Channel Linear Mixer
This mixer has six DC-coupled inputs, making it perfect for mixing both audio or CV signals from sources such as VCOs, LFOs and envelopes etc.
Additional features include the ability to split the mixer into two separate 3-channel mixers. Two separate mixer sections (S1 includes channels 1, 2 and 3 and S2 includes 4,5 and 6) are included, that have their own independent outputs.
Inverted and non-inverted outputs are also included that output the sum of all channels.
Each channel features a unity-gain, linear attenuator.
Features
https://www.wavefonix.com/product-page/6-channel-linear-mixer
These merchants probably sell this module. Huh?