OK, here's the thru-hole version. All the parts are generic stuff and should be readily available for anyone. As Stan observes, since this should fit in the case...
If anyone is interested, I can generate the set of Gerber files for either of these layouts. If there was enough interest for around 15-20 of the blank PCB boards, I could arrange to get them made. I would guess a single board would be around $3 and shipping a couple bucks. Multiple boards would obviously reduce shipping per board.
Edit: updated to latest design on board layout and schematic additions.