I use Enigma's item changer. You can literally put everything you would ever need on the recommended item tab for specific champions. I really don't know why Riot doesn't have this customizable already. =\
http://www.youtube.com/watch?v=_XYOMPXcPD0 Example video and download link in description. Yes it is legal to use.
http://www.youtube.com/watch?v=_XYOMPXcPD0 Example video and download link in description. Yes it is legal to use.