http://www.bobreeves.com/ Information on alterations, valve alignments and brass mouthpieces. Both custom and stock mouthpieces available. Online ordering and dealer locations. http://plainfield.bypass.com/~stork/ Custom-made and stock mouthpieces. Located in Plainfield, Vermont. http://www.warburton-usa.com/page2.htm Manufacturer of mouthpieces featuring a 2-piece design. One and three piece models and customization also available. http://www.zajamusic.com Valve oil, lubricants and accessories for brass instruments. FAQ and product descriptions.