One product often has multiple listings on Amazon, especially in Clothing Shoes & Accessories. We use ChannelAdvisor, and it only has the ability to match to one ASIN. Some of our competitors are able to match to multiple ASINs, giving their products many times more exposure. When products are submitted to Amazon, if there's no UPC match, a new product should be created. If UPC matches others, Amazon will return a list of products that can possibly match to. This extension should display a thumbnail image of all those products, display relevant attribute values (size, color, etc.), and give an option/ability to match to more than one ASIN.