Subject Sass, it's impossible. You only have one Thyroid. The thyroid is a complex as your DNA; and no one has the exact identical DNA so trying to replace it would not work because your body would send off it's internal defenses to kill it. The thyroid is the main controller of your metabolism, and we all know how important metabolism is.
Subject Lost, well who knows. I mean I might get it soon, and I'm approaching a two week break from school.