MickyMan, Carolan tunes should be perfect for you. The link is to midi files at The Contemplator website. It's well worth following the link, if only to appreciate midis created by the peerless Barry Taylor. The rest of The Contemplator site is worth exploring at your leisure, but I think you'll find that Carolan's tunes are perfect for your immediate need. When you've decided which tunes you like, you'll easily find the sheet music via Google.