The mkv format RAW accompanied with the OST for Tales of Symphonia: The Animation Volume 4 have just been made available for downloading via torrent by Quantum-Raws at Tokyo Tosho.
Knowing Abby, other ways of downloading the episode will be up soon enough, as for the impatient, I hope you have your trackers (and VLC Players/Video Converters) up and ready!
Edit by sukotsuto: Abby texted me to upload the Tales of Symphonia the animation Vol.4 RAW and the Tales of Symphonia the Animation Vol 4 Tokuten CD at sendspace and megaupload, so to those who wishes to download it, I had uploaded them here for your convenience :
Edit by a745: LINKS FIXED. They've also been added to the ToS Video and Audio pages.