Notification for Sales Order 'Ready to Dispatch' once the item is Stocked

I am looking to create a possible notification, that, when a Sales order is created with items that are not in stock, and the items are stocked (after a day or two), either through manufacturing or purchase, that a notification be issued to the concerned Role or user, that the Sales Order, can now be dispatched.

Is it possible to do something like this or will this come under a possible enhancement feature.