make sure you get the right HDD. There is the updated tracks version that has a security dongle. So there are atleast 2 hdd options.
My operator friend I think said he was able to copy one of his hdd to fix his broken drive. But I thought I heard it was hard to copy. I can ask if no one else can get it done for you. Since its not up on ebay for cheap, I would guess it not easy to copy.