Build a custom Radxa case sized to the real board. SliceFoundry's enclosure builder covers ROCK 5B / 5B+, ROCK 5A, ROCK 5C, ROCK 4B+ (and 4B / 4SE / 4A family), ROCK 4C+, ROCK 3A, Zero / Zero 3W / 3E, Zero 2 Pro, ROCK Pi E, and E52C / E20C - with ports and holes locked to Radxa mechanical drawings and DXFs.
Toggle HDMI, USB, Ethernet, and GPIO openings, confirm millimeter fit, optionally engrave a lid label, then export print-ready STL. Same tool makers use for Raspberry Pi, Arduino, and ESP32 cases.