Hexachrome is a specific process, not a simple one-click conversion. You have to buy/ license the respective color libraries, swatches etc. and use them in your artwork and then create the specific separations based on that.
Yes, sorry I did not properly word my question. If the Pantone Hexachrome plug-in no longer exists where does one go to get such libraries? Since the company I work for has not updated our Illustrator software I have no way of knowing if CS6 automatically includes the hexachrome libraries or if I need to push for joining the Cloud.