We got pretty interested in mask making while working on our Greek mask and I found that Dick Blick (art supplies) has a whole page of mask making supplies.

There are a couple of things that might prove helpful in going through TOG. I've been working on year two and there are at least 3 more mask making projects there.

First, the have a face you can mold a mask on:
http://www.dickblick.com/zz609/59/
I did find some sites on making life mask but all of those used plaster of paris which I deemed a bit too risky to use on a face.

They also had some cultural bisque masks. In particular a Mayan and Egyptian one that would have been fun to have when we had done those cultures:
http://www.dickblick.com/zz329/64/