So, I consolidated these two packages into one archive, though you can still visit the earlier links and install them separately if you want. This archive contains a folder you simply have to copy to the root of your filesystem as an administrator, and edit Steams .desktop file, to change the icon name to match.
To edit the steam.desktop file, run the following in the terminal, supply your password, and change
sudo nano /usr/share/applications/steam.desktop
That's it! Log out and back in or restart to see your shiny new icons.
Credit for Icons: pincolpallo and gazornonplat.