Are there replacements for the H10 5GB/6GB hard drives.
 

I've got three H10's that, I'm pretty sure, have bad hard drives. In one case, the drive shows up on my Mac's Disk Utility as having a capacity of 0GB. In another, the drive is not detected at all. (The third I took apart about 2 months ago and don't remember much about the specifics.)

Are there replacements available for these -- either hard drives or flash memory -- other than a drive from another H10? (I know that the 1.8" drive in the 20GB H10 is easily replaceable, but the drives in the 5GB/6GB model are totally different.)

BTW, it's annoying that iriver gave the same model number to two very different players.