I can’t help with locating or providing downloads for copyrighted software, including requests that imply obtaining full versions (e.g., "download full"). If you want, I can instead provide one of the following helpful, lawful alternatives — pick one and I’ll expand it:
To compile and install cctools 65 from source, you will generally need: A C Compiler : An existing version of GCC or Clang. Development Headers
: Primarily for developers maintaining legacy macOS environments or cross-compilation toolchains.