"I am not looking for an illegal key. I am wondering if it is possible to contact microsoft and buy an additional key, or something along those lines."
Did you even bother calling microsoft, or trying to contact them in some fashion in order to answer your own question? That might be the first place, as well as the smart way, to start in resolving your problem.
P.S.
Do not expect to be taken seriously on this forum if you fail to take the initiative to so sovling the problem on your own, rather than relying on others to do the work for you.
Good luck.
Eraser