The Store Locator in use on CAMEO EZ wholesale sites is a WordPress plugin which uses Google Maps for geo-locating and directions. It does have a spreadsheet importer, but it will take several hours to import a spreadsheet with several thousand stores on it. Below is a video that explains how to add and edit store locations.

You can download the store locator import spreadsheet here. Note: you will probably want to right click the link and select, “save link as.”