You mean how you can send them old mp3 files? Ask them! I think it is possible.
But if you mean how you can download the Axis Chemical mp3s, well, it just sort of worked. I clicked the mp3.com download button, and it opened a popup that said the file wasn't indexed. But when I clicked, in that popup, the link "find all files indexed under"...something, suddenly it worked and I downloaded the files! They aren't anything special though, sound like half-decent demo tracks for the XL-7, but it was just irritating that I couldn't find the mp3s :)