I've heard that there are some kind of sonic hot-tubs that create vibrations that break down the stones, without surgery. Have you looked into this?
I did and i have had this, it's the main reason why i have kidney stone fragments, and why all the stones i have in my system are passable. The big one i have is on its way out, which is good.
The only problem i am having is that there is something not allowing those stone fragments to be released from my system. The doctors will look at it in 3 weeks when i go back.