[quote name='Funky Dunky' timestamp='1465643845' post='3069873']
The OC-2 is somewhat more expensive, around £80, but maybe I could substitute this with a cheaper equivalent, and Robert is your mother's brother!
[/quote]
The Chord oc-50 is the job for you. Under £25 delivered on Amazon at the minute. One of my favourite octavers I've tried. Preferred it to the MXR Bass Octave Deluxe I had just before it and it tracked to a low G pretty repeatable.
Also it has a switchable drive option that dirtiest the octave sound which might mean you don't need the distortion pedal. If it were me I'd be tempted to go with the Chord and a used EHX Micro Qtron (or a mini qtron for preference if you can find one and don't mind the very un-mini size) for the most synthy fun...