A list of Raspberry Pi Compute Module carrier boards and devices – after hours coding
Amazon.com: Mini Base Board for Raspberry Pi Compute Module 4 Lite/EMMC Series Module, with Standard CM4 Socket and Color-Coded Raspberry Pi 40PIN GPIO Header, for Evaluating CM4 or Integrated into End Product :
MirkoPC carrier board turns a Raspberry Pi CM4 into a full-fledged desktop PC - Liliputing
Minimal RPi CM4 Carrier Board by dronecz | Raspberry Pi PCIe Devices
Creating a Raspberry Pi Compute Module 4 (CM4) Carrier Board in KiCad