welcome to forums Roxstar
see the itunes listing has worked already Dan, didnt take long at all!
info on the tunes if its a dj set is available under the liveset's section, you will usually find the tracklist listed at the start (which will be complete or updated depending if the show has run yet or not), some show the label's the release is on, many may not as new tunes/promo's are not signed yet! things such as "artist cdr" may be listed here instead!
the tracks played individually on the playlist, usually can be found by artist webpage, which will then usually lead you to the label website or some certain download sites to get them! you can try google searching them, but sometimes you just get other playlists where its been played before, so be precise!
as for the mp3's, there are many websites that sell all this EDM (Electronic Dance Music), but you may not always find these tunes on them as the release time for some of them may be a little delayed from when they are played on here! here is a few to help you out: www.beatport.com
if unable to find them on some of these sites, then look up artist's webpage or myspace search them, and it should lead you to their label or info when tune is released and further info etc!
hope this helps & see you on the forums!