Glass-Ware audio bipolar power supply I used this power supply in my build rather than design my own. You can substitute for any decent bipolar power supply that provides +/- rails around 15V - or whatever you want to use for your opamps.
Igor's calculator for rotary switch resistor values: Igor's Calcs GSheet Link. I didn't like the rev. log taper on the Frequency switch so I added my own calculations here: My GSheet Link