Paying off U.S. student loan from abroad?

Hi, hopefully someone can advise me with my query. I graduated from university in America. I have moved to New Zealand, and my student loan repayments have started. I was wondering what my options are on how to repay my loan. I've queried with the banks here in New Zealand, but have found out that each time I transfer funds, they will charge about $35. If I'm making monthly payments, that $35 fee will add up big time! Can anyone suggest any other alternatives?? Thanks heaps :)