Here is great tutorial how to make your own paper skull. It takes about an hour to cover the skull with paper mache and one more hour to peel and shore it up. Wouldn’t it be great to have your own inexhaustible supply of high-quality durable, practically free skulls? All you need is a resin skull, modeling clay/plasticine, newspaper, glue, WD40, spray wax, or silicone spray.
The resin skull is available for purchase online:
Grinning Realistic Replica Human Skull Home Statue