I will give you Azon Stock Checker plugin for WordPress

Azon Stock Checker checks your complete site to find Amazon links and codes and then filters down which products you are referring to. The stock checker will find any Amazon product on your site no matter if you created the links by hand or if you used on Amazon related plugin. Next it will run the stock check on your set intervals and it will send you a report if it finds products not in stock. There is also a manage screen in the plugin that will display the products found on your site and if it’s in stock what the quantities are. Azon Stock Checker is really an easy set and forget plugin that will do all the work for you. No matter how much products you have on your sites, the plugin will check it for you and saving you hours of work in the process!