Please help me find an Hendrix Style Octave-Fuzz, preferably with switchable Octave, that doesn’t produce shrill sounds when used in traditionally non-octave-typical sections of the fretboard.

Doesn’t have a switchable octave, but I liked the Catalinbread Octapussy as an example.

Had a Mythos Octave Pedal many years ago, but it was unusable to me due to the shrill sounds it produced when plucking certain strings and when playing multiple strings at the same time.