No info about availability.
Ring Modulator
This module contains an analog high-quality ring modulator and a 1x4 multiples.
http://www.analoguesystems.co.uk/modules/rs20.htm
3 Users are observing this
These merchants probably sell this module. Huh?
Included in 361 Racks, 192 are public:
Analogue Systems Analogue Systems RS-20