Need to turn pdf into xml file. Anyone have a slick way to do it?

I have old indoor drum line shows that I had written. Thank God I have the scores and the parts saved, but not the original files from an old computer. I want to remaster them in Sibelius but the thought of typing all the notes in makes me wanna cry. Does anyone have a slick (hopefully free) way of doing that?
I know battery will have to be done manually but I can live with that