Seal of Companionship

When i hit lvl 100 to all my professions i received achievement message (while my inventory was full) and i click ok but the game lagged and by mistake i discarded seal of companionship and i cant reaction to click no it was very fast to reaction is there any way to get ring ? i spend lot of time to lvl up my proffesions and no one want to throw that ring.. please find a way to get a ring.. Thanks.