All of these sounds were originally created for my own use. I've had these synths for years, so I think you'll find that these sounds are as good as it gets with the Casios- plenty of classics here, and a lot of unique stuff as well, especially from the very under rated VZ synthesizer.
The Casio VZ:
The Casio CZ:
The three Upright Pianos I did way back in 1998 for the Emu samplers. Now updated for Kontakt (longer samples, 24 bit) They are still fairly unique- common English uprights, one of which is perfectly tuned and set up, the others a bit more characterful. Think Brian Wilson demos and Ragtime piano!
UPDATE: All packs now have mp3 demos.