Module is available as a DIY project only.
This Module is currently available.
MG ID: 58530
Roman Buchla 285 Frequency Shifter FV-1
Roman Buchla 285 Frequency Shifter FV-1 combines two sets of functions - a top section with frequency shifting, and an independent lower section for both balanced modulation and classic ring modulation, all under complete voltage control. In addition to an ample supply of dedicated output jacks with multiple functions, you have musical control over all parameters with separate attenuators and the ability to dial in the amount of ring modulation you desire.
https://electricmusicstore.net/products/285-front-panel-for-diy-kit