Nitrokey 3A Mini Hardware

Hello.
I want to create a small batch of Nitrokey 3A Mini for personal use. I have found out that Nitrokey is open-source, and I want to order a PCB from the external factory.

I have certain questions that I cannot find an answer for anywhere:

  1. Is this GitHub repo up-to-date? GitHub - Nitrokey/nitrokey-3a-mini-nrf52-hardware: Nitrokey 3 USB-A Mini NRF52 hardware
  2. What PCB thickness is required for Nitrokey 3A mini nrf52? Since it should fit inside the USB plug, this is critical for PCB order.
  3. Where do I find a 3D model for the case spacer to be 3D printed?
  4. What external USB (metallic) case is used in Nitrokey 3A mini? Can you share part number (or link where to buy it), since it is absent in BOM in the provided repo?

Image for 3 and 4 questions accordingly:

Thank you