Just the bare PCB if you prefer to source your own components.
You’ll need to buy:
Resistors: (all L6.3mm D2.5mm P7.62mm )
10 x 220R (R1, R2,R3, R4, R14, R7, R8, R9, R15, R16)
5 x 1K (R5, R10 – R13)
1 x 2K (R6)

Capacitors: 2 x 100nF (C1, C2)
(Disc ceramic D4.7mm W2.5mm P5.00mm)

Diodes: 2 x 1N4007 or similar (D2, D4)
(P7.62mm)

LEDs: 3 x Kingbright L-113SRDT or similar 20mA
(LED3mm)

ICs:
1 x Opto isolator 4N35
1 x Hex buffer CD4050

Regulator: 1 x LM7805 in TO220 package

4 x MIDI DIN5 180 degrees socket

1 x 4 way DIP switch Width 7.62mm

Headers:
(all pitch 2.54mm Vertical)
1 x male header (1 x 2)
2 x male header (1 x 3)
1 x male header (1 x 4)
2 x male header (1 x 20)
2 x female header (1 x 20)
1 x female header (1 x 3)
3 x  male header (2 x 5)
2 x 5-way Eurorack Power IDC header
5 x 0.1″ jumpers

DIL sockets:
1 x 6 way W7.62mm
1 x 16 way W7.62mm

1 x DC power Barrel Jack DCJ200