fwiw a store over here in UK I noticed selling ipods was also selling non-apple accessories for them, including usb & firewire cables, power adaptors etc. In white with some reference to ipod design, if thats important. they were a bit expensive for basicallly white cables etc, but not the sort of silly expensive official replacements usually are.
edit: out of curiousity, does ipod transmit a serial code or whatever and maybe allow you to register the ipod itself? I assumed they would have to for the DRM stuff. Wouldnt do anything to stop theives just connecting to their pc's obviously but might at least be a way to stamp your ownership on it, bit like mobile phones though not as effective.