Available as an assembled Module and as a DIY project.
This Module is currently available.
Ring modulator
Release your inner R2D2 with this excellent Eurorack Ring Modulator.
Inputs for carrier and modulator.
Oscillator to generate a carrier waveform if nothing is present at the input
Carrier oscillator can be set as LFO or audio rate
Carrier oscillator sweepable between tri-sin-sqr waveforms
Voltage controlled carrier oscillator frequency
Voltage controlled carrier level
Dry/Wet signal mix
Usable as a VCA
These merchants probably sell this module. Huh?