I have been googling around for a set of 5-lug RS Wantanabes and no luck so far, regardless of bolt-circle. I know they're pricey but if a 15x9/4.5" bolt circle set was available, I'd seriously consider them.
You're right about the Minilites they do look similar...I have never seen them in a dark finish like that though. Usually, they have painted spokes and polished lips which look nice.