Well, you are an Opera user (or used to be
), so you have the mass downloading available at a click. You only have to open the "Links" window, filter the links by whatever rule you want (it would be "mp3" in this case), select any link(s) you fancy and hit the "Save" button. Of course, you have to go page by page... Opera also pops a little window in the right down corner, but can be deactivated in "opera:config" if I'm correct.
The FlashGot extension for Firefox does have a "Build gallery" function that lets you arrange a list of things to download from various pages. You have to set everything manually, using filters and regular expressions, and you need a external download manager as well... maybe the best option would be using wget or HTTrack