Hi Debbie,A very quick search on Altavista turned up this link [http://www.partitura.be/DATA/groups/collections.htm] It appears to be an online store in Belgium (maybe). Your song is listed about 5/6 of the way down the page under Songs of Dublin. It says it has the melody line and chords...and of course a price.
Good luck! Incidentally, that's one of the songs in the DT which doesn't have a midi with it. So if you get the sheet music would you please pass it on to someone here so we can make a midi to go with it?
Mary