Want to play Cale? And you can read music? ... With a bit of luck you can still find the sheet music for the Songs for Drella album. Island Music Ltd London used to handle the distribition of scores and parts for Sanctus from the Paris s'eveille album. Otherwise, check this section.
They are not official, but are provided here as reference.
All scores are available for download in zip format. Use an expander like to unpack them.