Poison Series Rim Lug-nut Key?

I bought a 2004 Honda Civic Si for a local dealer a few years ago, i am trying to get new tires on the car but no one has the lug-nut key to get these wheels off( and it was not in the car anywhere), does anyone know how i can find the right lug-nut?? i have gone to a bunch of different places and they all say "go here they will have that for sure" they are 17'' rims