Adding Affiliate Links To Products

Hi. Is there a way i can add affiliate links to products so customers can click on an Amazon tab (e.g. Buy this item from Amazon). This would be great if there are products that are out of stock. Rather than have customers leave us without making us any money, at least we can get some commission.

Without modification you can only add message with the link to Amazon to the promo text field (can be exported/ imported)

This text will be displayed at the right side on the product details page