The present invention is a method for providing, in response to a single search multiple product/service item query, search results for multiple products/services that are grouped and ranked by supplier based on which supplier(s) have inventory with respect to the greatest number of the queried products/services. The user can identify which vendor can best fill the entire order, simplifying the buying process. A single query can be entered by a user covering their entire required bill of materials list. The method is preferably implemented via a website server using known methods of Internet communication. The search results can be customized further to categorize suppliers by geographic location, supplier type, pricing or other criteria.