Backorder Button
The Backorder Button extension is the perfect solution for you who want to show your customers which of your products are on backorder.
It will replace the Add to Cart buttons with Backorder buttons for all of your products which are on backorder.
This extension works for every product type, and it will display which specific options are on backorder for grouped, configurable and bundle products.
It will also replace the Stock Availability Status label (displayed on the product detail pages) to state that the product is on backorder rather than in stock.
This extension also works in product lists, such as product search results or category pages.
It will even add a column to the product table displayed on the shopping cart page, showing the availability status of each product currently in the shopping cart.