(redirected) Alienware x51 3.5" Hard Drive Cage

Hello, 

I bought an alienware x51 off eBay and to cut along story short the seller had installed and ssd where the hard drive should have been and had taped it down to the base and so wasn't working at all. Now to get the system working I need a new 1TB hard drive (easy to find) and also the 3.5" hard drive cage that keeps the hard drive secure but this isn't as easy to find. Does anybody know where I can buy one from or have one I could buy off them? 

Thanks for your time