Available as an assembled Module and as a DIY project.
This Module is currently available.
Unity gain Stereo Mixer
10 stereo inputs.
40dB LED level meter.
http://www.l-1.su/UnityStereoMixer.html
4 Users are observing this
These merchants probably sell this module. Huh?
Included in 65 Racks, 39 are public: