Last I remember there was ONE and exactly ONE (1) guy on nextcomputers.org that had a working drive and was offering a MO dump service.
In theory though you can get your own working if you recap the bloody thing but nobody has ever done the job.
No--I have one of those also--along with both 1024 and 512-byte sector media. The NeXT stuff is quite different.
The more I read the Cube information, the worse the thing looks. Nobody seems to have any good idea of why the Canon drives fail--just a lot of guesses. The NeXT disks/discs were 256 MB, not standard 650 ones. Internal documentation on the NeXT box seems close to non-existent.