Stephen Burdick, lead guitarist and vocalist of Philly-based alt rock band The Stone Eye, uses a Wailbone Transparent Fuzz with a customezed hi-pass filter toggle which he has dubbed the "Hi Frequency Hog." You can hear this pedal in action on the track named after it, liked below:
https://open.spotify.com/album/5I7zmnrpkZtR0RlQ26Kglg?si=RofbbPSwRrqkffABP6xKqQ