I don't understand why you "removed all hundreds of megabytes of it".

At any rate, this is a simple python script to list all mp3 files in those posts (I like to use wget do do the actual downloading):

http://pastebin.com/cbhEgt6E

It uses the cool lxml library: http://codespeak.net/lxml/

(I use something similar to download all posts of a blog I want to read offline on my kindle).