I've got a surplus Backblaze Pod 1.0 case. They're top-loading, 45-bay, and the drives just drop in, with rubber bands around them to stop them vibrating. They use 5-port SATA port multiplier backplanes, so need compatible (non-Intel) SATA controllers. I can't remember if I've got a full set of backplanes and controllers, but I can check. PM if you're interested.