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 had the opportunity to customize the 'taper' on the Frequency switch so I added my own calculations here: My GSheet Link
Gerber Files: Gerber_StereoParametricEQ.zip - A note on the board: I chose to go with a 4 layer PCB design for this project, mainly because I just wanted to try it out. I'm not a PCB design expert or an electrical engineer but I think having the power rails, audio ground, and power grounds on their own layers might be a positive thing? I don't know. I do know that making it 4 layers means it costs more and is harder to repair (read, impossible if an inner layer gets damaged). So there's that...
BoM: Stereo Paramatric Equalizer BOM & Costs - this is my BoM and includes my parts choices, you might want to make your own selections. Like, you might not want to spend $200 on knobs...