You may require a different system depending on your needs.

Just need real time stock levels at each of our warehouses. 

You may need : Warehouse transfers, receipts from either a central point or p/o's created in each warehouse? Just a few thoughts.

Good Day,

You can visit the marketplace to search for applications based on your industry.
Please see the link below.
http://www.marketplace.sage.co.za/?tex_industry=any&tex_sage_products=sage-business-cloud-accounting

There is a 3rd party app for warehousing - https://za-marketplace.sage.com/en-ZA/apps/81078/fenya-wms/features
However, you can search for other applications on the link above.

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Regards