I recently came across the absolutely amazing Apple IIe enclosure for the Fruit Jam designed by the Ruiz Brothers. Since I did not have a KPR BM43 on hand and didn't want to spend $43, I did a deep dive into AutoDesk Fusion and I have created a mount for the Planck v7 keyboard PCB for the Apple IIe enclosure.
Thanks to everyone in the Adafruit Discord server for the helpful pointers and banter while I worked on this!
You will also need the updated keyboard case, because the USB-C port is in a different place on the Planck v7.