Install Flash for Chromium on elementary OS

I tried the following link to install via the commands.

$ sudo apt-get update

$ sudo apt-get install chromium-browser

$ sudo add-apt-repository ppa:skunk/pepper-flash

$ sudo apt-get update

$ sudo apt-get install pepperflashplugin-nonfree

$ sudo update-pepperflashplugin-nonfree --install

However the package pepperflashplugin-nonfree is nowhere to be seen, what repository does it lie within?