well idk about your bluetooth thing..
but if you go on www.phonezoo.com
you can make an account and its free to recieve ringtones, pictures, and sounds.
you have to save the sound as a ringtone when it comes in.
and if you look on phhonezoo and there isnt a song you want, you can use your own music too.
hope i helped.. if i didnt, sorry.