I want to preserve them as Jamma cabs. I don't want to muck around with major mods to run through various controllers etc for the consoles I want to use in my cabs.
I was thinking about a third cab, dedicated to consoles. Then, I have the problem of constant monitor rotation.
I saw this in the trade forum:

This could be the perfect solution for me. I want to do something similar so that I have 3 such boards for my Saturn, Dreamcast and J Xbox 360.
This allows me to treat these consoles just like I would a Jamma PCB, and not need a 3rd console dedicated cab.
Is there any off the shelf product I can use that will give me the Jamma male plug that will contain the video outputs? I suspect I can handle pad hacking and controller wiring myself.
Buying the above set up is probably not an option - I live in a 240 v world.