This is a fairly straightforward remix of my Raspberry Pi Zero 2020 Bracket that only needed a few numbers to be tweaked here and there to adjust it for the Compute Module 4.  I combined one of those (with onboard WiFi and eMMC) with a Waveshare CM4-NANO-A to run my Hypercube 300 (the same combination with a different mount has been running my AM8 for the past few months).  Other CM4-compatible baseboards the same size or smaller should also work, depending on your needs.

FreeCAD and STEP files included.