That's funny, I downloaded some songs from the Rockband packs today. I have encountered that problem with some files, like Something About You by Boston, and Green Grass And High Tides Forever by The Outlaws. Try later, I eventually got them.
They are trying to get professional web hosting, but I don't have a Paypal account to donate with.
Is there any way to attach large files to posts, or post them somewhere on the forum? I have quite a few songs from that website, and could give you some.