Osmun Music - Besides being a noted repair shop, Osmun is a great online store, offering new & used instruments, accessories, cases, and CDs.
Cantesanu horn repair and customization - Horn maker and repairman Felix Cantesanu specializes in customizing the Yamaha 667 horn, which includes a new Cantesanu leadpipe, braces removed and/or repositions, valves hand lapped, and lacquer stripped.
Chuck Ward (Chardon, OH) (440) 286-5612. email: cwardbrass@aol.com. Specializing in brass instrument restoration and custom modifications.
Stuart de Haro - Ace repairman De Haro has started making his own Geyer/Knopf-style horns.
Beck Brass Works - Repair, Restoration, Fabrication (replacement parts for vintage instruments), Sales (Marcus Bonna cases, used horns)
B.A.C. Horn Doctor - "Musical instrument repair services..." located in Overland Park, Kansas (outside of Kansas City).
Houghton Custom Horns - service & repair, used horns. They also sell rebuilt used horns at homelesshorns.com
Brass Arts Unlimited
The Brass Bow - "Fine Band & Orchestral Musical Insturment Restoration, Repair & Sales." Arlington Heights, IL. Interesting discussion of 'Cryogenic Resonance Restoration". Other offerings: "Precision Valve Alignments"; "Ultracleaning System"; BIAS (Brass Instrument Analyzing System).
Horn Improvement - So. California shop - slides, valve alignment, all brass repairs, chemical cleaning, dent removal, cryogenic treatment, new instruments.
No web site, but recommended brass repair shops:
Ron Pinc - well-known Chicago brass repairman. 630-889-2189.
Instrument Repair Resources
NAPBIRT (National Association of Professional Band Instrument Repair)
Online Mecca for band instrument repair. Offers a free pdf downloadable brochure on how to purchase a band instrument. Lists the 5 instrument repair schools in North America (1 each in Iowa, Minnesota, Wisconsin, Washington, and Alberta, CA).
Ferree’s Tools - Source for specialty tools for repairing band instruments
Votaw Tool Company - Musical instrument repair tools, parts, supplies. It's all here: abrasives, adhesives, brass rod, brass sheet, brass tube, brushes, buffing/polishing, case repair, cleaning, cork, drills, cases, lacquer, patches, rivets, washers, rotary valve bumpers & string, sandpaper; parts for your Conn or Holton...
The Music Trader - Reference site boasting 70 titles on musical instrument repair, among other attractions, including "Comprehensive Dent Removal Tool List," and "A Business Guide for the Repair Technician."
PROBIRT - Professional Band Instrument Repair Technician resource site.
Fred Sullivan's Tips & Techniques - French horn. One of an 8 part VHS video series "to provide answers to the common repair problems music educators are faced with in the classroom.
Band Instrument Repair Technical School (Minnesota Southeast Technical School):