You might be able to find them on Amazon.com, or on a Torrent, or on one of those video archive sites like AllUC. They used to be on TV Links before it got shut down. Youtube might but they take TV Shows and movies down but check there. If not, they are on DVD - he first 20 chapters on are one and the other five are on another. There is a site I know for free http://www.yidio.com/show/star-wars-the-clone-wars
Or you can look for the Clone Wars at Ant, it is easier there in looking for tv episodes.
you can go to starwars.com