Where did the ubuntu wily sources go?

I'm getting fail to fetch errors in apt-get:

Failed to fetch http://us.archive.ubuntu.com/ubuntu/dists/wily/main/binary-amd64/Packages 404 Not Found [IP: 91.189.91.23 80]

I thought it was a sources error, or DNS error, but /dists/wily/ really doesn't exist at us.archive.ubuntu.com anymore. Nor does it exist in several mirrors I tried. Where did it go? What's the valid wily source now?

The wily version is in EOL (End of Life): no longer supported.

You must follow these steps to use apt-get, by setting the use of oldversion repositories:

[https://help.ubuntu.com/community/EOLUpgrades][1]

1. modify with sudo the file /etc/apt/sources.list, e.g.:

   sudo nano /etc/apt/sources.list

2. put into it:

   deb http://old-releases.ubuntu.com/ubuntu/ wily main universe restricted multiverse deb-src http://old-releases.ubuntu.com/ubuntu/ wily main universe restricted multiverse

   deb http://old-releases.ubuntu.com/ubuntu/ wily-security main universe restricted multiverse deb-src http://old-releases.ubuntu.com/ubuntu/ wily-security main universe restricted multiverse

   deb http://old-releases.ubuntu.com/ubuntu/ wily-updates main universe restricted multiverse deb-src http://old-releases.ubuntu.com/ubuntu/ wily-updates main universe restricted multiverse

3. save the file

4. do: sudo apt-get update [1]: https://help.ubuntu.com/community/EOLUpgrades