Resistors are 1/4W 5% (or better) and capacitors are 5mm pin-spacing, unless otherwise noted.

C1, C710n2
C24.7u 16V12.5mm spacing, electrolytic
C3-C6, C10, C13, C16, C20100n8
C8100n1Only for 16F72X devices. Specsheet recommends 100nF to 1uF ceramic
C9, C151n2film
C11-C12470p2ideally should be film, but ceramic will fit better. Use C0G/NP0 type
datasheet claims 2.2nF but in practice 470pF were always used. 2.2nF will sound too deep.
then again, your mileage with 6581s may vary and you might want to experiment with different values.
C14, C1910u 25V22.5mm spacing, electrolytic
IC2PIC16F882A-I/SP1SDIP28, socket-mounted
IC3MOS 65811DIP28, socket-mounted - Must be sourced from second-hand market
IC4MOS 85801DIP28, socket-mounted - Must be sourced from second-hand market
ICSPSIL 6-pin male header1optional
L11.5uH1DC 600mA or more, to be mounted vertically (5mm spacing)
LED1-23mm LED2color to your liking
OUTSIL 3-pin male header1optional
R1, R3-R4, R7, R101k5
R2, R5-R6, R910k4
R8, R111002
V1TME0512S15V DC to 12V DC converter
V2TME0509S15V DC to 9V DC converter
X1MOLEX 5481905191mini USB type B shielded socket
X2Lumberg 1503-091optional, stereo 3.5mm jack connector - 1503-17 works too