Sometimes terrible things happen, like when a laptop goes a place where they take the hard drive as it leaves. Then they keep the hard drive bracket because they forgot to take it off! You can get a new drive for ~$50 but where do you get these priceless holders? Well I ran into this situation and decided to 3D print one! Now all IT departments have a real reason to get a 3D printer!
I started a repo at https://github.com/daberkow/3d_harddrive_chassis, and the first laptop I added is a Dell Inspiron N7010, random but it works!