Prebuilt Face Templates/Models?

Hello There,

This is my first post so I hope that this is in the right place.
I am a doctoral student on the east coast in the USA and part of my research involves having adults and children watch brief animations. I am completely new to 3D animation (I have only ever made simple 2D animations in Flash) and have started using blender recently. Needless to say the learning curve is quite steep and since my emphasis is on doing research and not animation I am turning to the interwebs for help. I am curious if there is a resource (or a person reading this) that has prebuilt templates of 3D human faces that I might use. Ideally they would be life like as opposed to cartoony or heads of animals but I am open to anything. Since I am a graduate student and am poor it is unlikely that there would be any compensation except for my eternal gratitude however if you would require a nominal and or reasonable fee then we could talk.
Thansk for reading this, if my posts seems vague it is only because I have such little prior experience. Any response at all is greatly appreciated!
Thanks ahead of time.

Perhaps this is what you’re after.

http://www.makehuman.org/