Not to blow my own harmonic horn, but you may find a lot of potential examples in my two tunebooks... The Great Canadian Tunebook (try those French-Canadian and Acadian reels) and Taylor's Traditional Tunebook.
I sequence at least one harmony track in nearly all of my midi files. All you need to do is to use sequencing software to isolate the lead and harmony tracks. Then transpose them into whatever key you prefer and print them off. It'll probably save you a lot of time and effort.