After two different vendors (Guitar Solo PUblications, and Hal Leonard) failed to fulfill a planned order of Gyorgy Kurtag's Op 15b, The LIttle Fix (or "The LIttle Predicament", depending on how it gets translated). I finally came across avendor who actually had the score.
Ironically, the actual publisher never got back to me about selling me a study score directly so I found a vendor in Italy. Fortunately for me the bulk of the sales page on the websie was in English. I have bluffed my way through foreign language purchases before! I know just barely enough Spanish and Vulgate Latin and a smattering of koine Greek that if you present me with a web page that has an order form in a foreign language the bbasic logic of the visual design will tell me what I need to know.
And so I managed to get the score. But first I had to contend with the inherent laziness of postal workers who refused to walk p an admittedly steep drive-way to get a signature from me. So after two non-attempts by the United States Postal Service I ended up having to bus out to well, kinda the middle of nowhere, to pick up the score at a "local" post office. Fortunately for me I have today off because of an appointment I made with a sleep specialist to see if I have any problems. I probably do. Well, it gave me a chance to actually pick up a music score I probably wouldn't have sen if left to the ever eager hands of local United States Postal Workers.
For anyone actually trying to get Kurtag scores I advise the obvious, check out Editio Musica Budapests' webpage and contact Hal Leonard for most of the big and obvious Kurtag entries. For more obscure ones, especially Op 15b. Go with Clarius' web page. Just make sure that when you pladce the order it's to a delivery address you know that you personally can sign for when the big envelope arrives.