Research task: Finding online stockists of our products

We are looking for somebody to do a research task for us. We want to provide somebody with a list of our products and their barcodes and then somebody researches the products and find out the names of the stockists selling the product eg eBay, Amazon etc. There are just less than 900 products that we will need this done for.

This task is not about finding new stockists it is just about seeing who is currently selling each of our products.