E.M.
From my experience in the floral world, here's what I would do- buy a sheet of styrofoam from Michael's. Wrap it in birthday wrapping paper, tissue, whatever. Buy some bamboo skewers, like you would use for shish kabobs. Poke the skewers in the foam at regular intervals, chop them down to just below the total height of the iced cone cupcakes, slide a cupcake onto each skewer, voila!