The tunes would be encrypted to the PC that downloaded them.
The only way around this is to have someone download the tunes, rip them to CD, send you the CD's and the you import them as mp3's. It's enough to make an honest customer go ballistic.
I would never advise anyone to use a peer to peer network to illegally download music because it's illegal and unethical but your situation sure does present an interesting question. "If one has actually paid for the music and not received the product, is it actually wrong to download it via a file sharing network?"
Presuming you lived in a country where the download could take place via iTunes store, there would be no issue. In this narrow case, I'd find it difficult to see where harm is inflicted upon the artist or the record company.
But just so we're clear, that would be illegal. So I'm not advising the you do it.