Tracking Inventory at Multiple Warehouses

Does anyone know of a third party solution that lets you track inventory at multiple warehouses and integrates with Sage 50 2013-2014?  Sage ERP 100 is more than I need and can afford.  

The only workaround that I can think of ---without a third party solution--- is to create a separate item ID for different locations (e.g. part 002 at warehouse A would be called 002A); however, this would be hard to manage if you had hundreds of different items at 11 warehouses.  Plus, you'd have to make an inventory adjustment each time you transferred inventory between warehouses.  

Thanks a lot.

Dustin