Enable an alert on a product level for client if "back order" is enabled

Currently, there is an alert when a client orders too much than is in inventory at the top of the product page saying "Unfortunately there is not enough inventory of [PRODUCT NAME]'s to fulfill your request."

There is no alert if there is no inventory, but back order enabled

The scenario then becomes: the client may not look at the "projected ship date" and wonders where their product is when we need to produce

A solution to this would to have an alert that says something like-

"There is not enough inventory of [PRODUCT NAME]'s. We will fulfill this request once inventory has been replenished. Estimated ship date for this product is [ESTIMATED SHIP DATE CAPTURED FROM PRODUCT]."