Where can I find the source code for NVIDIA's Cg toolkit?

Question

NVIDIA's Cg toolkit is a dependency for a project I'm attempting to compile, and only has ppc and x86_64 architectures on macOS. As of now, I'm currently trying to compile the software for x86_64 and arm64 to troubleshoot issues between the correct Intel build and an unstable M1 build.

I would have to either...

• Scrap my M1 build and build for x86_64 with the possibility that Rosetta 2 may go away in the near future.
• Find and compile all the dependencies for x86_64 and arm64 for a longer lifespan.
• Find an alternative to Cg.

I'm trying to stick with the 2nd option, so does NVIDIA provide source code for their very obsolete Cg framework? Did they used to, and if so- where? I would like to attempt to build that from source.