You can find at least Season 1 and 2 here:
http://laleyendadeost.activeboard.com
I think you'll have to register (free). But beware, they've gone very strict on leeches these days. If you don't contribute anything within a week after registration you'll get deleted and your ip banned forever :(
When you've registered, go to By Genre / Por Generos, select Television, and browse the pages.