It appears the download for Torchwood Asylum here works for the UK and Europe, but not for the USA (no doubt some USA person will now tell me he can get them OK, but at least some are having issues)! Whats more the BBC download is only open for a week, so here is a download for every country, and its there forever (I hope :) )
Its a .rar mp3 file. If you can't deal with a rar file, google for the free download!
Who can't access the BBC MP3 files, and what country are you in?
I will put the other 2 Torchwood audios, transmitted today and tomorrow, for download too (now I am aware of the international problems) :)