Those lenses haven't been made in a decade. Be aware they're not going to really be safe for field use anymore. Guys with the old Scott goggles and original Vents Predators are in the same boat. I'd love to wear my old Predators, but without safe, current lenses, it's just not worth the risk.
i have a few skulls (<--- profile pic) and i would love to play with them but i would listen to "pump scout", i was wearing mine a few months ago with a basically band new lens and got hit in the lens. the lens and mask started to vibrate and it made a weird sound not like when you get hit in a more modern lens. it scared the crap out of me and i have not worn it since, highly recommend not wearing it and just putting your skull on display on a shelf.