It would be a shame if they have gone. Got most of my Sorabji scores from there.
That's just one reason to wish it good riddance; they used to do more than anyone's fair share of non-public domain scores, so maybe that's why it's gone belly-up.
That said, they had very few Sorabji scores in any event and most of what they did have were copy mss. or copy O/P publications; they had hardly any of the typeset editions.
Anyone wanting to acquire any of these legitimately knows how to get them, as either paper copies or as .pdf files.
Best,
Alistair