Asterisk Nearest Store Locator /w UK Postcode /w Voice Recog

We are looking for a Asterisk Application/Module to be developed that puts the caller through to their nearest UK store, based on there UK postcode. Will need Voice Recognition system. Must work allow multiple configurations/databases for for more than 1 Company/IVR. Call Flow will be as follows: Customer calls 0871 XXX XXXX. Call is greeted by a voice prompt saying "Welcome to XXX. To enable us to put you through to your nearest store, please say you postcode." Customer says postcode "NG8 8XD" Application interperates it and asks for confirmation "Did you say NG8 8XD, please say yes or no" If customer says yes, application calculates nears store using GPS information from Postcode/GPS data.