Buy Mount And Blade Serial Key I Lost My Mount&blade Serial Key And Now I Need It For My Game(alrdy Bought Full Game From Future Shop)?

I lost my Mount&blade serial key and now i need it for my game(alrdy bought full game from Future Shop)? - buy mount and blade serial key

I have really bought into a Futureshop in Ontario, while I was on vacation (I live in British Columbia) to my friend that lives 9 hours of travel given my game, but never stopped, but still I'm lost and remove as My M & B does not work, but now I need my serial number to activate it again!