How to find the same product from multiple retailers

Let's say you're boycotting a company. But you find a product, like, say a wallpaper you really like. You know this retailer changes the name of all their products so they're harder to find elsewhere. But all you have to do is a speedy little Google Image search:

1. Get the URL of the image (i.e., right click the image, select 'copy image location' or something equivalent)
   
   
2. Head over to images.google.com.
3. Click the camera icon on the search bar.
   
   
4. Enter the image's URL from the first step, and search!
   
   
5. Now select from a few different retailer options for your product.
   
   
6. ...and then purchase from the least evil of the retailers available.
   
   

Now you're searching the Internet like a pro!