All of the android eyes have to be installed by hand. They were never calibrated right when the assembly line machines did it. If you end up working in there, they give you a long, black coat, night goggles, and turn the lights down so you can only see the work at your station. Understandably, seeing other people elbows deep in eyeballs for ten hours at a time was freaking the workers out.
If a size is not listed, it is sold out.