I've got a songbook of mountain dulcimer arrangements here. Only 4 songs right now, but I've got another 65 in the unpublished section of my songbook, and I'll gradually work on the arrangements and move them to the public side. Search my user name or the songbook name, 'dulcimer tunes" to find it.
I do this as part of a monthly newsletter for my dulcimer club. Let me know if there is a particular song you would like, and I'll see if I can do it for you.
Enjoy!
Tom