Arduino Nano Slim Case USB-C (Centered)
Modified off of elmanu's model by adding a USB-C port and a rounded square for the wires. The USB-C hole is centered but slightly larger to account for port position variation.
ShafinM also made a USB-C version, but I found that their offset port made it so that my board did not fit in the case. Furthermore, the board (sitting in just the bottom half) would shake around due to the increased size. They didn't include a step file, so I just modified off of elmanu's file and provided my step file here.