I had this idea before I got my gunmetal wheels and when I asked my local powdercoater about it, he also mentioned that you can use a transparent black powdercoat on a chrome wheel to get the same effect;
however he said it's really hard to prep chrome for powdercoating without scratching or etching the surface, which could ruin the chrome. It's really hard to get something to stick to a smooth surface, like paint needs sanding, and a good chrome job is about as smooth as you can get.
I've seen wheels come in black chrome, like you have pictured, and it would probably be much easier just to get those wheels already done instead of messing with all of this paint/powdercoating stuff.