Hi Heather,
these used to be a good source for piano solo's
http://secure.pgmusic.com/shopping/shop_...=10&Submit.y=25

Unfortunately they must have discontinued quite a few of the series including the classical series.

I had a few of these , but, along with quite a few of my other software disks, they became damaged during storage.

I dug out all my old Clavinova, Disk Orchestra Collection Disks they other day, they had some wonderful piano arrangements
Disk plus Book ( play along) They actually play as a Direct Disk Play ( ie they can't be loaded, but do play)in the KN7 Keyboard they also play in my PR602. Fortunately most of these seem to have stood the ravages of time (as they can't be backed up by normal means) At approx $50 AUD retail per disk & book, I would have been shattered. Still they were worth it, they sounded better than any commercial GM midifile I owned at the time.

Unfortunately I gave away all my old Disklavier Piano Disks when I sold it. Unlike the Clavinova Disks , they wouldn't play in a KN keyboard. I recorded them all across via midi to a sequencer. I must have driven the neighbours nuts. Unlike a digital piano ( where you can turn down the volume) the disklavier was a normal acoustic piano with midi ( a bit like the old player piano except that it used computer disks instead of piano rolls). Truth be known, the neighbours must have been happy to see it go, I used to listen to it for hours on end.
Actually, they should have been thankfull, at least they didn't have to listen to me practising ( haahaa).
Must check one day and see if all those midifiles survived ( doubt it)

best wishes
Rikki