Trying to find tasteful ringtones like "Marimba"

I've been trying to find nice, tasteful ringtones similar to the "Marimba" ringtone that came on the iPhone. I'd like to have some variations to assign to various contacts. All I can find are pop songs, obnoxious sound effects, "bodily noises", disco animals, etc. etc. What I want is other, simple, tasteful ringtones that can ring in a business environment and sound "professional". Anyone have any leads to packages like that?