I just dropped off a big screen wall in the meeting area. It is just 6 17" LCD screens in a wood matrix.
It is quite heavy and was rescued from a bin, so take care, but feel free to have a play with it. Haven’t tested it yet. You should be able to power each monitor by supplying +12V to the yellow wire and ground to black. I did have them all running off one ATX supply but that has since been removed.