where can i find it

i am looking for tenchi in tokyo omg files. if you dont kow what omg is it is the show but in english i can only find places that stream it but i like to download and watch on my own time dose any one know where to go and down load it

http://www.anime-eden.com/anime/series.337.htm
here you go, all 26 episodes + OVA
that series is old isn't it?...