It took a bit to find, but after searching, I came across this website:
(home[dot]comcast[dot]net[slash]~iccpyc[slash]yume[slash]) Anything in brackets, just type the actual character. I can't post anything that looks like a link (anti-spam device, I guess).
Click on the picture, go to "More", then click on "Music scores."
In music scores, you should be able to find "Wounds" for piano, violin, and duet.
Also, there are a few more different pieces on this website:
Under "Shingetsutan Tsukihime."
If it makes you feel any better, I also liked the music from the anime.
Hopes this helps.