Forvo is a site where people record the pronunciations of words in many different languages. There is a section for Irish, currently with over 4,000 entries. If the word you are looking for isn't there, you can add it and others will record it for you:
http://www.forvo.com/languages/ga/Currently edited by Bríd Mhór (aka Bríd Eilís) and Breandán (aka Brendan), there is a strong Connemara representation. We would welcome pronunciations from speakers of other dialects who have native-level pronunciation.