Then 20GB drive it has to be, and they're getting thin on the ground, new. Dabs have some Hitachi Travelstar drives -- I suppose they bought up the IBM business -- which are 2.5-inch drives, and so need an adaptor cable and mounting brackets.

And it looks as though stocks are not going to be replenished.

That manufacturer's link you provided is a bit ironic, both the BIOS upgrade that would get around some of the HDD limits and the "discontinued" announcement on the same page.