The latest leaked XXUFME7 android 4.2.2 (with odin) can be downloaded at http://adf.ly/ROAZw.
If you wish to see how to flash this onto your device you can view the video below. This is actually quite simple to do. However, be sure to make a full backup before as this will wipe all of your apps and any data on your internal storage. Also make sure your phone is in download mode before starting to flash the firmware.