Join Date: Apr 2008
Bikes: Cervelo RS, Specialized Stumpjumper FSR Pro, Schwinn Typhoon, Nashbar touring, custom steel MTB
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Have you read any of the frame building websites? They usually link to vendors. Hell, if you look-up vendors with Google or Wikipedia you can probably find distributors. Unfortunately, bicycle tubing is still sold old-school: you're mostly likely going to have to make phone calls to complete a purchase.
For tubing, try Henry James, Nova Cycle Supply, or UBI. Fairing is the US distributed for Reynolds tubing; I don't know of anyone who sells it through an on-line store. Kirk Pacenti sells lugs and Columbus tubing. His on-line store isn't very complete, so you may have to call or e-mail.