Those would work. Larry has tried to adapt that style of insulator, but they had clip-ons, not very successfully. I would think the style shown on your link would do it, though.
These are a good idea, but there are too many openings that a Mini can stick their head through, you would have to run several lines of that and as I mentioned before, I have had the hot wire electricity jump from the wire to the pannels, and even to my barn. I try to keep all hot wires away from the metal round pens.