Where to find the true wholesale suppliers?

I'm running an online store and having a  really hard time finding TRUE wholesale suppliers for me to work with so I could improve the product lines I'm offering. Searching on the internet leads to 99.99% to any middlemen who love to call themselves being a wholesaler. But after comparing their prices to what the products sell for on the online market I quick find out they are nothing else but someone who tries to sell me their products that they bought from a wholesaler and they already have marked up so high, that there is no markup of the product left for me anymore if I want to offer competitive prices and so I still would be able to make sorta living of it. Are there any sources, hard copy directories or whatever else where I could have more success finding true wholesalers for me to do business with?

Any advices are highly appreciated

Thank you

verdecove