Step 1: Building The Mold
Using the template as a guide I made a mold from foamcore. I glued the pieces together with hot glue and covered the mold with papier-mâché to add rigidity. I made sure the mold had a lip around the perimeter.
Step 2: Preparing the Mold
Step 3: Making the Stamps
Step 4: Imprinting the Mold
Step 5: Casting the Latex
Step 6: Removing the Latex from the Mold
Step 7: Adding Ear Hooks and a Strap/Speaker Mount.
I used a few pieces of a bent clothes hanger for this. I applied a couple of coats of latex before bonding them in place with more latex. The neck strap mount would also hold a speaker to produce a buzzing sound.
There are better pictures in later steps.