Here is a long shot. Anyone got, or know someone who might have, an Epson QX-10 horded somewhere.
One of my disk drives (Drive B) has developed a fault. These drives are special 2/3 height ones developed just for this machine. I've isolated the fault to the motor circuit board but it's not an easy repair. If you, or some hoarder you know has a working or broken machine and might be willing to sell it (or just a drive) let me know.
I'm pursuing the part internationally but I thought I'd ask first here anyway.