where to find Arm GNU Toolchain building scripts for arm-none-eabi-gcc ecosystem ?

Hello,

before the transition to new download site (https://developer.arm.com/tools-and-software/open-source-software/developer-tools/gnu-toolchain/downloads-1) the old download site give us the possibility to download all the subsystems sources and the building scripts to recompile arm-none-eabi-gcc/gdb with different options or more up to date subsystems. There was bash script build-common.sh, build-prerequisites.sh, build-toolchain.sh to rebuild the entire toolchain, and the last one that I can find was here : developer.arm.com/.../gcc-arm-none-eabi-10.3-2021.10-src.tar.bz2

Now, with the new download organization, I am not able to find the updated build scripts for the newly published arm-nine-eabi-gcc 11.2. Are they still available to download elsewhere ?

Thanks for any help,

Alexandre