Richard and Denise Wilson dulcimer - needs a bridge
Instruments- discuss specific features, luthiers, instrument problems & questions
You couldl probably make it yourself, which is pretty easy. Just about any hard material will work, a threaded rod, hard wood, hard plastic, corian, etc, as long as you can shape it. Start with a piece 1/4" thick x 3/8" high x 1 3/4" long. The 3/8 will be the fret board to string starting dimension, it should be a bit higher than needed to create a nickel space from the top of the 7th fret to the strings. Taper the length by sanding on the 1/4" surface so one of the 3/8 sides is about 5/16 or so. Use a triangle file or nick the sharp edge on the 3/8 side of the tapered edge for the strings [ match the slots on the nut]. They don't need to be very deep, just enough to locate the strings. The 3/8 side is the one that will face the nut. Sand the bottom [opposite] 1/4 surface, keeping it square, until you get the nickel spacing. I would keep the nickel space on the plus side [about the thickness of a credit card] to allow for string wear-in. Sand the ends to fit the width of the fretboard. Done.

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