VIA hex and HHKB plate file here - https://drive.google.com/drive/folders/1sDQ88GOsrZ6MLrWAHXouCiD0VSrLI5DF?usp=sharing
Edit: I'm sorry to hear about people's experience with the packaging. As the cases/parts where handled by the vendor and not by us, I'm really disappointed to hear that the PCBs were not even wrapped and just thrown into the packaging. I myself have ordered one (haven't received it yet) but I will share my experience here as well.
9/29: I've reuploaded the plate file (which has been looked through by a friend and I trying to figure this out for a few hours), and tested it by uploaded to Sendcutsend. Make sure you sets units to mm!
I had a POM one cut from Ponoko a few months back in preparation with split BS (the only difference). I'm trying to figure out the VIA situation stay tuned and I appreciate the patience.
SpencerLThanks for posting the VIA hex. I am curious to hear if your spare pcb is also missing the daughter board. It seems a few of us already have that issue, which is quite disappointing.
SpencerLIf you look at the pic @yanfali posted there is a spot to select millimetres. If you select that it will take it off inches (would be way too big). As you can see in his pic it should be 302.35 x 111.85, but the decimals are off so its 30.235 x 11.185 millimetres.
SpencerLMight want to tweak the DXF one more time and change the holes from m1.5/m2 to M3. You're going to need to drill the plate, or just use screws to cut into the POM.
SpencerL@SpencerL thanks for uploading this stuff! Will the plate file only work for the HHKB case? I have the other case but still would love a split backspace.