Amazon.com: Vox Valve Energy Mystic Edge AC Pedal : Musical Instruments
Multi Effects Archives - Vox Amps
Guitar Pedal X - GPX Blog - Vox's Valvenergy NuTube Mystic Edge AC30 style and Copperhead Drive JCM800 style Overdrive / Preamps are fairly decent budget options for those genres
Vox launches the Valvenergy line of Nutube-fitted pedals