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 Valvenergy Mystic Edge Electric Guitar AC Distortion Effect Pedal – All Music Inc.
VOX Valvenergy Mystic Edge – demo by Stuart Ryan - YouTube
Vox Valvenergy Mystic Edge – Thomann United States
Used Vox Valvenergy Mystic Edge Preamp AC Overdrive Guitar Effects Pedal | eBay