How to buy from large companies if you do not have a brick and mortar business?

I have a mobil purse business and find that some bag wholesalers (Fossil and others) say that they do not sell to companies that do not have a brick and motar store, but yet I see these same ladies bags being sold on sites like "purses.org" "the find" and many other websites. How do they get ahold of these products? I'm stumpted