I found a single 4mm dia motor from somewhere, and am in the process of modifying to see if it works. it struck me how small these things are!

I'm also in the process of working out the electronics, looking at how Flip Dot displays are run, and probably follow the same method for the driving circuitry.

Using the following resources for that ( Thanks to Martin for the idea) :
http://www.dhenshaw.com/Art/Dottie/start.htm

https://wiki.attraktor.org/FlipdotDisplay