Kurtag's Jatekok is probably as good a starting point as any :O
However I'm unable to find a score for any of them, which makes me sad. Gar.
The thing about modern music... most of it is copyrightedTry ordering from amazon or sheetmusicplus
Not targeting you specifically, but I find it mildly amusing that some of the biggest "proponents" of copyrights on this forum also have the most extensive collections of bootlegs.
Jre and ThalWhenever someone requests a modern piece, both tend to respond with "it's under copyright, can't share it"