Not sure if this fits exactly, but how about a Wounded Paw Attack Goat?
http://www.woundedpaw.com/catalog/pr...roducts_id=150
Description states:
"And for another set of sounds there is the OCT switch to change the fuzz section into an octave up fuzz."
However, I still think you might have to split the signal to get fuzz ONLY on the top octave.