Add small feature to Existing magento extension -- 2

We need a small feature added to an already built extension: Extension is: [login to view URL] Basically all we need done is when you go to Magento Admin - Catalog - Manage Products We need to be able to see QTY per store view, Site A show 10 QTY Site B show 50 QTY All Sites show 60 The extension allows you to set up QTY per store view however it does not show the qty in the manage products grid for each store view, it currently just shows the total stock in all store views. Hopefully this is a quick an easy fix.