[Plugin: Gravity Foms Directory & Addons] default search result

Hi,

I need to use the search function to do an address lookup by zip code. It it working really well, but I need to return a default address for the cases when a user enters a zip that is not listed. (Some people may use the site from outside the area where representatives are assigned – we still want to provide them with contact info.) Any suggestions of how I can accomplish this?

I am using directory version 3.2.1 and wordpress version 3.3.1

Thanks!
Beth