Just bought a used Mac mini, mid 2011 2.5 i5 with the Radeon GPU, and while it works fine, whoever put the thing back together before shipping it did a number on the torx head screws on the inside. The three large torx screws that the plastic base attach to are all stripped. I'm also missing the two screws on the wifi panel that hold the HDD in place. Anyone know where I might be able to source these screws from? Thanks!