Found that they have the whole movie up on YouTube. I'm currently watching it right now. The animation holds up alot better than I imagined. Very surreal, and has an old Heavy Metal feel to it.
Here's the first video:
[youtube=560,345]J3FsASNavdU&hl=en&fs=1[/youtube]
Also here's a French clip for another film René Laloux did called Time Masters. The english version is pretty rare to come by but as you can see from the clip it has that same surrealness that Light Years and Fantastic Planet had:
[youtube=560,345]ImYdkoZXOsU&hl=en&fs=1[/youtube]
And in case someone hasn't seen it, here's the trailer for Laloux's Fantastic Planet:
[youtube=560,345]SgCxCZNkQ9E&hl=en&fs=1[/youtube]