Hi KrakenDev,
If you download CPCtelera 1.5 (current development branch) and look into the cpctelera/tools folder (no need to install it), you will find both 2cdt and cpc2cdt tools to create CDT files out of binaries. Both of them are in source code form, but both of them should compile under GCC/CLANG either on Linux, MacOSX, Windows/Cygwin, Windows/WSL or Windows/MinGW. You can compile them in your preferred environment and use anyone of then to produce your CDT. You don't need to install Cpctelera for this: just pick both tools' sources and use them as needed.
Good Luck with these latest hours :)