There's two isues with the metal coins:
1) Copyright. It's likely these reverted to Pinnacle, along with all the other copyrights.
2) Die costs. Making a metal die or stamp is expensive. Even if the copyright reverted to Pinnacle, if PBE doesn't have access to the die they will have to pay tooling to make a whole new one.
Honestly, I'd like to see PBE come out with their own prizes. Even if it's in the same vein. (Also, for the love of all that is wholly, if you are going to make coins, GIVE THEM A VALUE ON THE COIN).