CustomHarmonicas.Com: Customized diatonic harmonicas made by Joe Filisko, Richard Sleigh, and James Gordon, using the "Filisko Method" of upgrading harmonicas.
Harmonica Manufacturers and Builders: List of manufacturers, with addresses and email, including companies without web sites. Provided by Harmonica Information Press.
Harmonix: Manufacturers and designers of the first production electric harmonica.
Lee Oskar Harmonicas: Product information, and distributer list. Located in Washington, United States.
Neil Graham :Custom Harmonicas: Custom made professional Harmonicas. Highly responsive modified Marine bands featuring radical reed modifications and improved air flow. As played by Australia's Jim Conway.
Super Harmonica Site: Mark Lavoie produces custom harmonicas using laser cut titanium and vermont maple wood harmonica combs. Bristol, Vermont, United States.
William C. Romel: Custom crafted instruments. Las Vegas, Nevada, United States.