You can find the latest CWM (126.96.36.199 I think) or Philz touch (6.12.8?) In the I9300 forum. You'll find it in the development sections. The recovery needs to be KitKat-ready. That's why it's best to update to the latest version (I don't know from the top of my head from which version they are KK-compatible).
Remember to make a backup of your efs or even better a full backup (can be done with those recovery's). If you don't like it completely you can alwas go back with only a few clicks. It's worth doing it!