We do not have the ability to duplicate a location at the moment. You can, however, export the data you need and import it into a new location.
Exporting/Importing Menu Items
Take note, at the moment, when you do this for menu items, it imports ALL of the settings for that location, not just the menu items.
Exporting/Importing Buttons
Both Contact Buttons and Shortcut Buttons (dashboard) are located here: