I'm trying to find four replacement mounting screws for the 2.5" hard drive in my MacBook Pro 2011 15".
Here's a pic of the four screws (one attached to hard drive).
I tried Googling and can't find anything. Are these screws available online?
I'm not sure why the tutorials are suggesting T5's. Historically the proper Torx is a T8.
Regardless, they're meant only as pegs to stabilize the drive inside the body. You don't need these explicitly. So long as you have something with compatible threading and reach, it will function the same.
I used to use a service called "The PowerBook Guy" which has morphed into Keane Mac Repair: http://www.keanesf.com/. Another resource for parts and fixing stuff.