Korg N364 Disk error... Help!!!

[James Argo]

Guys...
Floppy disk in my Keyboard KORG N364 has been broken... it can't read disk anymore. Everytime I put a disk, it shows "Disk Error" I did clean it by disk cleaner over & over. I even took it off by open it's back cover to be cleaned manualy. Still can't read nor write... I contact the local dealer where I purchased it 4 years ago ( I live in small town in Indonesia far away from nowhere...) They don't sell the spare part. They offer me to make 2 months order to get a new one shiped for US$450... for only the disk drive... What the...
So I think there must be a way to fix it or replace it by some other type of disk drive... I check out Roland, doesn't work... regular PC disk drive... doesn't work... (different cable hook)... So anyone know what works safe for it ? Or how to fix it... I know how to handle electronic things, but still need a clue...
Any help would be great...

Thank's