We have some items that fall outside the traditional inventory model of simply "in stock" or "not in stock," such as items that we do not house but will order on-demand, new products which we would like to accept pre-orders for, and items which would ship directly from our vendors. Currently these types of items always show as being Out of Stock, which is confusing to customers who do not understand that even though we don't have the item right now, we could easily get it for them.It would be nice to be able to tag an item as one of these 3 item types in our ERP system and have it reflect in the webshop as the item's Availability.