AcePuppy: If there are more, no one has found them. Blockbuster did not really sell or give many of these away.

rbudrick: Portnoyd bought one on eBay, sold it to Nicola.
4th Survivor sold to Nicola. Nicola traded to me. Still two copies.

Esquire: Those extra copies are unconfirmed. Again, I am sure there are more than "2" but the grand total is under 5 right now for sure. There are only 2 CONFIRMED copies.