Annoyingly, I couldn't extract audio from the flash files either; the decompiler I'd linked didn't work, and the others I tried would only record as much as accompanied the frames in the animation (which was shorter than the audio, so it cut it off), or simply failed to extract it because it wasn't a 'simple swf'.
So I apologise, but I had to record it in Audacity anyway. ^_^ Music from the char select, OP and ed files are in
this archive, cropped and amplified. Hope that's ok.