I don’t know whether the URL will come through properly, but you can do a Google image search on the following four words: inside outside caliper divider.
For harp + flute, try “Canterbury Suite,” by Jared Denhard; “Occasional Music for Flute and Lever Harp,” by Ernie and Becky Brock; “Algues,” by Bernard Andres (for oboe, violin, or flute); and
For harp + flute, try “Canterbury Suite,” by Jared Denhard; “Occasional Music for Flute and Lever Harp,” by Ernie and Becky Brock; “Algues,” by Bernard Andres (for oboe, violin, or flute); and