Create Logo

I have a draft logo that needs to be turned into the final version. Please see attached. I don't want to use the icons as seen in the attached file. Instead, I would like to see if I could get faces that are a bit more "human" than those seen here. Perhaps real human faces could be used. That's an idea. I need faces that display various emotions, with one face that shows the "middle ground" of all the emotions coming out like the one in the attached file. This is probably harder to explain than it is to do. Real faces or simulated faces would work, as long as they convey emotion. If you use images, you will need to be able to document where they came from. If they are royalty-free, I need to see the release before I will purchase. The final needs to be a vector file capable of being used in a variety of sizes.