Top Selling eCommerce Industries or Businesses?

[Pat]

Does anyone know where I could obtain a list of top ecommerce stores or industries. I am essentially looking for a Fortune 500 list of company names and revenues but with eCommerce stores only instead of any type of business.

I could not find it by business so a next best alternative would be by industry. For example a list of the top revenue industries (toys - 3.4bil, electronics - 6.9bil, furniture - 4.3bil, etc).

I tried searching forbes and other sites but I really dont know how to word it to find the information I am looking for. Thanks in advance for anyone who has any ideas on where to location this information.