Here you can read how to find the URL of the supplier product feed file:
- Login to your supplier's web page and search this or similar pages: Dropship, Wholesaler list, Data, Product Data, XML data, CSV data...etc
- You can write the supplier an email and ask him this:"I want to sell your products in my online store. Do you have product feed file which is updating daily? (CSV, XML, XLS or TXT file)"