Commodore 64 disc version

Does anyone remember having this on disc for the Commodore 64? The instructions make mention of it but I've only ever seen tape versions..

Thanks!

To my knowledge, Crystal Kingdom was only available on tape on the C64.

I know the C64 had a floppy disk drive, but I never came across this game being on disk.

Just wondered if there was a disc version or just vapourware. Thanks!