Song: THIS ILLUSION (piano ver.)
Instrument: Piano, though a Piano + violin would be awesome :D
Anime/Game: Fate//Stay-Night
Artist: Haga Keita
Album: Fate-stay night PS2 Original Soundtrack
Comments:

This isn't exactly the same as the OP song, this version is much slower and has no lyrics. This is meant for mostly piano and I will gladly accept just a piano transcription, but I have a friend who plays violin and if I could get sheet music for violin too, that would be wonderful. :D I've looked everywhere for this and all I can find is transcriptions for the OP song. Youtube link here: http://www.youtube.com/watch?v=6GbctgywNBg

Thanks for looking at my post and I hope someone will transcribe this for me. :)