Came attached to a cab I've had for a while. Slightly worn, only has one stud as pictured but I think you could just use a guitar strap button as a replacement.
Jen volume pedal - $sold
Old but seems to work well, not much travel so not great for big swells. Made in Italy, I think they also made enclosures for Cry Baby wahs as well?

Pickup Wellington or chuck a fiver for postage, cheers