Granite (http://tanbrown.org) support after installed

My Granite (http://tanbrown.org) has been installed for a little while now and (http://maplered.com) I am continually concerned about that we do not have any support underneath the overhang which is about 12 inches. What can I do to add support for the Counter (http://GialloFiorito.com) top at this point without adding corbels? One end of the cabinet has a finish panel on it and (http://maplered.com) the inside portion that is not currently finished will be getting beadboard. I might be able to hide some metal behind both pieces. Any advice would be greatly appreciated. My Stone (http://g603.net) is 3CM Labradorite Big Blue

Thank you
Kristen