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 | Reverb
Vox Valvenergy Silk Drive & Mystic Edge | Review | Sam Bell - YouTube
Willamette Valley Music Company - VOX VALVENERGY Mystic Edge Valve Distortion Pedal VEME