Join Date: Apr 2008
Bikes: Cervelo RS, Specialized Stumpjumper FSR Pro, Schwinn Typhoon, Nashbar touring, custom steel MTB
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.