Need to downgrade gcc and glibc

[RedCode]

To rebuild an old complex project I need gcc13 (+gcc-libs) and glibc 2.38. My aarch64 installation is updated to the latest versions (gcc14 & glibc 2.39) and I am failing to find/get/compile the old packages...
I was unsuccessful finding outdated packages online (too bad [url]https://archive.archlinux.org/[/url] does not exist for aarch64)
I didn't had old packages in /var/cache/pacman/pkg (yes, my bad, I deleted them for disc space...)
I couldn't find the PKGBUILD for aarch64 of gcc or glibc ([url]https://archlinuxarm.org/packages/aarch64/gcc/files[/url]: An internal error occured) to recompile the packages manually
Adapting the x86_64 PKGBUILD I failed after trying the last days

Does anyone still have an gcc13 and glibc238 package in their pkg folder or can guide me how to recompile those on aarch64?
Many thanks in advance - any help appreciated!