(Reuters) - The European Central Bank has rejected Ireland's preferred solution to a dispute over the cost of servicing money borrowed to rescue a failed bank, EU sources familiar with the talks said on Saturday. Dublin wants to avoid having to pay 3.1 billion euros a year until 2023 to service a promissory note it issued to underwrite failed Anglo Irish Bank during a meltdown of the main Irish lenders after a real estate bubble burst in 2008. ...