If you were after saving some money...or erm "Maximising existing product"

You could always consider the following option with Bulgins.
A Spider...
Well, thats what I used to call them anyway.... If you've got say 8 screens, and a controller...you're more or less looking at 16 bulgin plugs to connect them all up together... Well, if you build a "Spider" you can do it with half that...
Basically, you need to build yourself a junction box...with the appropriate number of "arms/legs" coming off of it. Each "leg" ends with a Bulgin lead. One leg plugs into the controller, the other legs plug into the screens... The resulting spare bulgin plugs can then be used to make a spare "spider"....