[Sloop John]

Tried your dealer? KIA should make the exact touchup paint you are looking for.
BTW - your car looks exactly like mine. Wolf gray? Hard to tell in the lighting.

 

[Sloop John]

I actually haven't talked to our local Kia yet. Checking here first to see if there is something I can pick up myself quickly. Our local dealer wasn't the best to deal with in the past with my old vehicle so I actually got this new Sorento at a different dealer out of town. Yes, it's the Wolf Gray. I love it!

Usually dealers (their parts dept) will have touchup pens. I think for your needs however, you want something you can brush on with an artist's brush. Hopefully they will have something like that being it is for the wheels.