I might have some, although I think most of mine is piano duets. I'll post again once I'm sure of what I have.

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I have The Twelve Days of Christmas, Jingle Bells, and Greensleeves.

I don't know what level these are on but there's 50 here.

Great website by the way, the guy can find pretty much any song for you, and I mean any song! Check it out!