It's costly, and it doesn't look like it's all that clean, but it IS a Viper, and it does come with the Snake Charmer footswitch (man, I'd love to reverse engineer that thing)
It's in Texas, here's the link: https://reverb.com/item/19537632-ada-viper-combo-amp-with-snake-charmer-pedal
I gave you the schematics of the footpedal ;D