I am so sorry that this happened to your D. A professional Muramatsu is a very very nice flute. I don't think that you will be "bugging" her flute teacher to ask more questions, flutist are very attached to their flutes and she is very aware of what your D is going through.
If I were you I would contact the people at Murmatsu
MuramatsuAmerica I'm sure that they would have some idea how to proceed from this. Another contact that you might call is fluteworld
Flute World
Good luck and I am so sorry that this happened.