We, at Algopixel Technologies, have open-sourced key management implementations which can be used as reference for NPNT compliance requirements for the Flight Module Management Server. Please check them out here: https://github.com/algopixel/npnt-key-management
Will be adding more scripts with time. You are welcome to contribute.
Feel free to reach out to me at [email protected] or comment on the github repo in case of any queries.