Rust 1.48.0
You can use this tarball for the next major release of Rust (1.49.0), if a newer Rust 1.48 hasn't been released.
To use them, do the following.
$ mkdir -p /path/to/rust-1.49.0/build/cache/2020-11-19/
$ cp *.tar.xz /path/to/rust-1.49.0/build/cache/2020-11-19/