Here Are Some Dropshippers
Here are some sites that provides the service of connecting etailers and dropshippers. All of them are paid ones. I personally have tried some of them.

http://www.doba.com/
They act like the middle man, you deal with Doba and Doba deal with dropshippers. You can pick products you like to sell on Doba site, have a data file you can use to update your inventory. Their payout isnt that great.

http://www.salehoo.com/
Provides huge list of dropshippers. I have tried their service. Good one. You have to pay one time fee of $67 to become member there. EBay certified.

https://www.worldwidebrands.com/
Very reputed service. The price to pay is quite high though, $299. Lot of EBay sellers use their service. They are EBay certiied.