Google maps Store Locator for Iphone/Android

I have a UK only B2C online Store Locator with approx 1,000 records in it, being presented using Google maps. I need to create a version that can be used on i-phone and Android also using the Google maps api. the user will start the search from their phone's gps, or enter a location themselves, the service will then query the store database and find the 3 nearest and show these as markers on a map and also display the coresponding address, phone etc... in a text list below the map. This is a pretty standard store locator, just on mobile. it will need some look & feel (which can be copied from the existing online locator) and i will need to be able to update the store data with new records etc.. moving forward. I have hosting, so will just need the completed files that i can host locally and run this myself.