Available as an assembled Module and as a DIY project.
This Module is currently available.
VU Audio Meter
Stereo/dual VU metering module with buffered thru outputs for each channel. An additional switch turns the beautiful lamps behind the VU meters off, in case your rack is running low on power! A couple trimmers on the back of the module allows the user to define the VU range of each channel independently.
Remember: max current with lamps off is +10mA/-10mA
http://www.addacsystem.com/product/addac800-series/addac812vu
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These merchants probably sell this module. Huh?