Is he Greek?
Did you find any? Now and then the Cosmote ones pop up on IPTV Bonanza but last one day at most till they are taken down (search them via 'GR' or 'OTE') and I doubt they would be on or work smoothly come gametime on weekends or during CL/EL games midweek.
Trust me, all of Greeks that don't pay up the official subscription look for a way but there isn't any at all or permanent and trustworthy unless they go the official way or are slightly connected with a guy that knows a guy that lets you stream via a server or something that has Novasport and Cosmote. It also comes with a subscription.