Unicorn cars

Turn ten I am a huge fan of your game and bought a xbox for the reason of Forza 4 and more Forza for and I have been wanting a unicorn car the one that I want is the top secret supra and the s-15 if it is possible please let me know how I could get one gamer tag is zetlo if you can contact me please and thank you

Current unicorn and contest opportunities in Forza Motorsport 4