Hmm.. Since mp3.com disappeared, there's not as much nifty stuff.. I'd recommend Bedlam, but they don't seem to have any mp3's on their web page.. and though Lothorien does, it doesn't look like it's whole songs, though. And you've already seen Tinsmith and might even have their CDs.

Or you could just browse my mp3 collection.. http://flan.umiacs.umd.edu:8900 (from UMD machines only, l: mp3 p: mp3)