You can directly use the latest latest Snapmaker Luban version and generate the controller FW upgrade package:
https://forum.snapmaker.com/t/snapmaker-luban-downloads-and-updates/4949/18
You can get the official controller source from the Snapmaker Github, with instruction on how to compile the FW package. The FW from the modules is not yet open-sourced, but given they offer the possibility to create a FW package for it in Luban, it should come in the future 