Available as an assembled Module and as a DIY project.
This Module is currently available.
Eurorack/Banana Jack Format Jumbler Passive Module
The Waveform 3U Cats N' Bananas Eurorack/Banana Jack Format Jumbler Passive Module is 3HP and lets your Eurorack rig and your Banana Jack rig be friends. What could be better than that? Just make sure to ground your bananas to the black plug, and mix and match.