You won't get a clean octave up from any of the analog circuits.
The best bet would be an FV-1 project (Pythagoras or Arachnid PCB with a pitch shift algorithm).
It won't be as pristine as a Whammy or Ricochet, but it can do an octave up and/or down simultaneously.
It will, however, be polyphonic so you can play more than just single note lines.