I have a few one is called
DVD TV which has several screen savers like Log Fire, Ocean and also has some obscure ones like washing machine. Another one is, Amazing Aquarium Video, several tanks and different kinds of ish. I got them from Lovefilm and copied it.
I got this one too from Lovefilm, Exotic Saltwater Aquarium - BLU-RAY Version, and copied it, it has full 1080p video footage of 5 different tanks. Only useful if you can play blu-ray disks tho. (this is available to download in the newsgroups but it's 27gb.)
There is one on the newsgroups if you use them called, Plasma.Aquarium.720p.WMV, you could burn it to
DVD. It 278 days old, so you'd need Astraweb or Giganews.