This Module is currently available.
Eurorack breadboard inferface module
This module contains a 400 point breadboard, mounted to a laser cut Delrin face plate.
Includes are Four 1/8” mono jacks, and a 100K single turn potentiometer.
These components have four inch 24 AWG leads that can reach any position on the breadboard.
Standard 10 pin power connector mounted to top of breadboard provides a -12V, +12V, and 2 Ground rails. Breadboard marked with red paint to signify power cable orientation.
See what it does here
and here
and even here