Any way to buy Bioshock Infinite's tunes?

Bioshock Infinite had a good handful of modern songs covered in a 1900’s style. I’d really like to lay my hands on some of these–the ragtimey cover of Tainted Love, for example, is just plain awesome. Any way to get these (legitimately)? I checked iTunes–no dice.

Unfortunately no, which is crazy because they were so well done but here is a play list of them someone created on Youtube.