| Action Electronics | Parts |
| Allied Electronics | Parts |
| Audiokit | Tube Amplifier Kits, Speakers, Parts, Tubes |
| Bertech-Kelex | Electronic Components and Solder Products |
| Farnell | Parts, Tools |
| Fuses Unlimited | Fuses |
| Main Electronics Receiving Tube Page | Tubes, Parts |
| Maplin Electronics | Parts |
| Minute Man | Parts |
| Parts Connexion | Parts |
| Parts Express | Electronics and more |
| Pegasus Developments Ltd | Tubes and Electronic Components |
| RS - Components | Parts |
| TAD - The Tube Amp Doctor | Tubes, Parts |
| THL Audio | Parts |
| Tube Amp Doctor GmbH | Tubes |
| Van Weelden | Tubes, Parts |
| Welborne Labs | Tube Amplifier Kits, Tubes and Parts |
| Wickmann | Fuses, Fuse Holders |