After some tracking down, today I finally received the box that contains the backup archives of all Magnetic Scrolls' work.
The hoard consists of 29 TK50 backup tapes, four boxes of 5.25" floppy disks, one zip disk and a few DAT tapes.
Strangely, there's also a 5.25" floppy drive in there. So recovering those disks ought to be a matter of finding an old PC and plugging the drive in.
The TK50s represent the most difficult problem however.
Any and all materials recovered from these backups will be uploaded to this site. I'll be tackling the 5.25" first.