yes those ribbons are exactly whats needed, and thats a bloody good price too.
only thing to watch for is the length of them, that might be ok length, I only mention it because as you fold the hdd over into place, the ribbon has to be folded at an angle to kind of offset the player into a more central position as the ribbon connector on the korg mother board is set to one side rather than centrally located.
but I think 2" should be more than sufficient for that to happen
as for the 8mm drive, I suppose it "might" be possible, there is some film applied to the back cover of the korg which may be able to be removed, and by not using the hdd plastic wrap thats already in the korg and no kind of foam protection as it lies on the motherboard maybe, but youd have to sellotape or something the hdd to make sure it doesnt short anything out with contacting the bare components on the board.
I tried my 8mm hdd by wrapping it in the plastic wrap the korg drive is wrapped in, and by placing it on top of a very very thin piece of foam and it wouldnt fit at all.
However, it is possible it could just squeeze in perhaps.
I would urger anyone to get verification of this before they make a purchase of a 8mm hdd though.
I might try it again myself, but until then its safer to assume 8mm wont fit.