Well, you can watch it on Youtube. Since the Sylvarant Arc aired a few years ago, it'll be hard to find a working torrent for it and such. Tethe'alla Arc finished earlier this year, but will probably still be a little hard to torrent.
You haven't seen me wandering around mentioned 'Tales of Symphonia OVA/The Animation' like... several thousand times around the forum/in my blogs? xDDD