Don’t know of one, I made up my own but for my version which adds several (11, but who’s counting) panel components above and beyond the original.
There’s information on hole sizes at Kosmo Specification (it doesn’t include arcade buttons, I used 1 1/8" diameter). Drill 8 holes in a row for each of two pots, an LED, a jack, and an arcade button per stage and you’re most of the way there. Then you just need 3 input jacks, 3 output jacks, and 2 toggle switches, on the left or right or both sides.
I did mine in software but there’s always graph paper.