Thanks to Gil Ayan and Scott Lerner!
http://www.sheetsofsound.net/images/OvertoneModded.pdfHere's the BOM. Quantities are approximate. I suggest ordering a few extra of everything except the 350v electrolytic caps. These are the mouser catalog numbers.
(2) 140-XAL350V47-RC 350V 47uF 20%
(2) 588-45F470E 5watts 470OHMS 1%
(1) 72-RWM410-3K9-5 3.9k 3watts 5%
(3) 75-516D475M063-E3 4.7uF 63volts 20%
(3) 598-CD16FD331JO3F 330pF 500V +/-5%
(1) 598-CD15FD391JO3F 390pF 500V +/-5%
(1) 140-500S5-121K-RC 120pF 500V +/-10%
(2) 660-MF1/2LLT52R222J 2.2Kohms 5%
(2) 71-RL20S-G-3.3K 1/2WATT 3.3KOHMS 2%
(2) 660-CF1/2CT52R154J 150K ohm 5%
(2) 71-CMF60150K00FHEK 1/2watt 150Kohms
(4) 71-RL20S-G-220K 1/2WATT 220KOHMS 2%
(2) 660-CF1/2C184J 1/2Watt 180Kohms 5%