When it came time for sculpting the natives head I again used plastilene clay. I decided on making two different heads so my puppets wouldn't all be identical. Once the heads were finished I made a two piece latex mold of both heads. Then a two piece mother mold of Apoxie Sculpt clay. The mother mold acts as a rigid support for the flexible rubber mold.
I sprayed the inner surface of the latex mold with mold release. Then reassembled my mother mold. I used Polytranspar Liquid Cast as my casting material. Here is a picture of the mold in my hand and one of the cast heads.