Welcome to the forums :)
The Olav Basoski Logic 404: Mixing Electronica remix contest is closed. I think the files were only available for users you signed up to participate in the remix contest.
However, although the Logic 404 tutorial source files are not available for download, the tutorial doesn't require them - and it's very possible to replicate the sounds of the tutorial.
If you're starting out with Logic, I think the Logic 101: Core Logic 8 would be a great place to start:
You can also download the finished project that you'll learn to create in the tutorial from the above link. Even for intermediate users of Logic 8, this tutorial is very useful IMHO.
btw, you can check out the previews videos for all tutorials on their respective pages.