Is there any reason you want MP3s? There are MOD versions of them available, which are perfectly accurate to the original musics. I've attached the Orig, OhNo and Holiday ones; I don't have the L2 or L3 ones handy sorry.
In case you specifically need MP3s, MOD to MP3 convertors are also easily available. However, if you can't find / work one of these, let me know and I'll convert them for you.