The mask is just a welder's mask with a turret lens assembly and a skull paint job. The welder's mask can be found at Home Depot, Harbor Freight, or occasionally even Goodwill (or similar places if you're outside the US). You might find a turret lens on an old-style movie camera or microscope, but most likely you'll need to make one. The plumbing section at the aforementioned Home Depot would be a great place to get the parts. Plumbing fittings epoxied to a jar lid and painted appropriately would be a good start. You could also use pieces of kid's toy telescopes or binoculars. Then just paint the skull pattern on the mask, add Green LED's inside the lenses for the finishing touch, and attach the lens turret to the mask with epoxy or Velcro of whatever you prefer.