This Module is currently available.
Passive Ethernet Case Interconnect
This pair of modules will connect two Eurorack cases together via an Ethernet cable (not provided). These modules will work even if they are not connected to the same ground, meaning they will still work even if the case is battery powered. These passive modules come in a pair and feature 7 connection points.
(price is individual; module is sold in pairs)
Omnitone 7Path Ethernet Patch Cable