Even though I haven't tried to dynamically create an arbitrary number of dashboard panels based on search results, I think it might be hard/impossible (I might be wrong though). It is probably simpler if you can live with a bar or column chart like so;
your search for events | chart first(availableNo) as Available first(productionNo) as Production by cn
Then you click the little chart icon called "Results Chart", and alter the formatting options by selecting bar or column chart, and set "Stack mode" to "Stacked" and "Multi-series mode" to "Combined". The layout can be a bit cluttered if you have more than 30 bars/columns.