| 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. |
Classical
