This dataset contains CoarseData (if you are looking for the expression model, find it here) and FineData augmented from 3131 images of 300-W with the method described in the paper CNN-based Real-time Dense Face Reconstruction with Inverse-rendered Photo-realistic Face Images.
I have been building my understanding of the forms of the face prior to this project through various digital painted studies. Archive available in most of the popular 3d file formats including Blender, 3ds Max, Maya, Cinema 4D, Obj, Fbx, Stl.