hey guys for some reason one screw that holds the center cap to the rim is missing on my car. (I wonder how it came off)

the rim is konig zeige and i was wondering where could i get another one of these. Do they sell them at rim stores and if so how much?

 

Does it look like a common screw, that might be sold at any really good hardware store?

 

not really but i will check again before.

i went to the wheel store and the guy said he could order it. i forgot to ask anyone know how much this would be and what i would get? 4 screws (2 philips 2 star and a key)