This Module is currently available.
Mixer / Output module
A small but handy 4 channel mono audio mixer module, with features not usually found in similar products.
Features:
4 input channels with level pot.
Master gain control.
Led Vu meter
Headphone 1⁄4 output with level , replicated in Control Room output.
These merchants probably sell this module. Huh?
Maneco Labs H.R. MIxer (eurorack)
Maneco Labs H. R. Mixer Output Module