Not that I know of, but since you can re-do all the quest with that char again (even the ones with one-time-obtainable-objects), it fair to asume that in order to get another goblet you can do it that way.
This I know for a fact: A friend losts his trophy (He drop it on the roof of the house in the island and couldn’t get it back), so he sent a msg to cip and they replied that they couldn’t help him ‘cause as I said is a one time obtainable item. So, now there he is without his goblet