Icon/Image on Low Stock or Sold Out Images

Hi!

is there a way to automatically have a “low stock” image (uploaded by me) display on top of the images of products/services that are low in stock.  Similarly with Out of Stock?  Little image would ideally display on regular shop or events page and on the item details page.  Also- since quantities are not updated until the customer checks out- is there some CSS where I can make in bold, italic red font below the item description (or just style the last line of the item description) to say “please note that inventory is not updated until checkout” or something like that? 

have you manage to do this?