Not trying to be presumptuous here. Seems to me you have already acquired the hardest parts of building the machine.
- The populated playfield.
- The insert panel.
Those contain the machine specific parts. Pretty much everything else is generic to System 11B. The hardware is available from various Pinball parts merchants.
You have already demonstrated your 1337 woodworking skillz so the cabinet should not be a problem for you. I think the only things you need are:
- The parts in the cabinet.
- The transformer.
- The power box.
- The cabinet speaker.
- The wiring harness from the transformer to the backbox.
- The wiring harness from the backbox to the coin door.
- The tilt mechanism and related items.
- The flipper switches and related items.
- The volume control and related items.
- The parts in the backbox.
- The metal backing plate.
- The knocker assembly.
- The backbox electronics.
- The speaker panel.
- The speakers.
- The display.
- The plastic speaker cover.
I am sure there are other things that I am missing but that's probably a good starting point.
I have a fair number of the electronics available if you're interested. A few of the boards (sound and power) have problems that I am working through. The big screw terminal 30,000uF capacitor and bridge rectifier can be replaced with a custom board I can make for you if you want. The 30,000uF capacitor can be replaced with 2x 15,000uF or 3x 10,000uF capacitors in parallel on a board. The fuse on the side can be incorporated on the board.
Anything in red below works.