Is there any way to download older After Effects SDKs (e.g., 2019)?

I’m interested in developing C++ plugins for After Effects, but I’ve noticed that the recent SDKs no longer include the required .lib files for plugin development. I’ve read that older SDKs (such as the 2019 version) did include these libraries. Is there any official way to download older After Effects SDKs, like the 2019 version, or to access the .lib files that were included with them?