http://mirthaluzfacundo.blogspot.com...emporanea.html
This blog has a load of good stuff - worth checking out Lachenmann's Gran Torso (though I suspect it's the same one Derek linked above). I read music fairly well, but it's entirely impenetrable for me. But it's not one of those 'interpretive' things like Treatise.
Dumitrescu certainly has scores - I checked out some of his from my uni library last year. It's amazing, but very difficult to play right. If you can find them, some of Dusapin's string quartets touch on similar territory, and are a lot better (IMO and all that)
I don't tend to scan a lot of the scores I get, I'm afraid. Maybe I should start... If you can find Igor Ozim's studies in contemporary violin (or something like that) it's utterly amazing (and has Lachenmann's utter bastard piece Toccatina).