Sometimes a publisher will advertise a score on their catalog or website they can't exactly get right away ... or at all. This is one of the downsides of hunting for chmaber music for classical guitar. It probably can't be helped as it is a bit hard to keep something in print just because it's cool chamber music if no one buys the stuff.
Take The LIttle Predicament for instance. I discovered this awesome little piece for piccolo, trombone (tenor) and guitar and the Hugarian publisher has it around but Hal Leonard may have problems getting it and my local Hal Leonard procurment point Capitol Music seems undecided on whether or not the piece is available or unavailable. It wouldn't be the first time I've asked them to hunt for obscure chamber music that may not be easy to get. It took me three years, I think, to find Castelnuovo-Tedesco's SOnatine Op 205 for flute and guitar.
Anyway, here's hoping I can actually get the Gyorgy Kurtag piece because it's a sweet little piece. If anyone happens to know how I can get it feel free to post something here. :)