The list below contains ensembles which can be found on Sheet Music Plus. If you click on a link, you will go there, and easily find the titles available.
Baritone Ukulele, fingerstyle
Two Flutes and Bassoon
Two Flutes and Violin
Violin and Cello Duets
Two Violins and Viola
Flute, Clarinet and Bassoon
Three Violins and Cello