BRUSSELS (Reuters) – After several months of attempts, euro zone finance ministers failed again on Monday to choose a new head of the bloc’s bailout fund, EU officials said. Ministers need to agree on the successor of Klaus Regling who will retire in October after having steered the European Stability Mechanism (ESM) since its creation in 2012 in the midst of the euro zone debt crisis. One of the three candidates, Italy’s Marco Buti, quit before the poll on Monday, but neither of the other two candidates got enough votes to be appointed. Luxembourg’s former finance minister Pierre Gramegna and…