Available as an assembled Module and as a DIY project.
This Module is currently available.
Specs are approved by the manufacturer3 channel switch
The BI-DIRECTIONAL ROUTER is three switches which route one input to either of the two outputs or either of two inputs to one output according to a pulse or control voltage level.
https://prismcircuits.net/products/serge-triple-bi-directional-router
Elby Designs ES12 Bi-Directional Router
ST Modular CV SCAN - Bi-Directional CV