I'm looking for a sturdy, secure and reliable box for posting a 3.5 in internal hard disk in case the winning bidder wants me to post it.

Asking because I had a previous sour exerience of a buyer receiving his hard drive and suffering more than a thousand bad sectors. Prior to postage, I had ran a thorough scan of it using HD Sentinel Pro which returned with perfect working order and zero bad sectors. I was frustrated as I had packed the hard drive inside an anti static bag and wrapped multiple layers of bubble wrap, placed the entire lot in a plastic box, then finally even wrapped multiple layers of bubble around the box itself.

Any advice which box (preferably something from Australia Pos) would be most secure for shipping a very fragile 3.5 inch internal hard drive?