You should also try Ebay. Before you buy, you can check the upper right side corner for the seller's reputation based on how much activity and customer ratings. I have also been looking for 19 x 8.5 OEM wheels but haven't found a set in the color I want. Ideally, you will find a seller who has a set that was exchanged right after vehicle purchase with little or no mileage.
I also want a square set (all wheels the same size) and most used sets are staggered which means two different tire sizes and no option for rotation of the tires.
Here is a set in great shape freshly powder coated in gun metal:
http://www.ebay.com/itm/19-INFINITI-M35 ... d4&vxp=mtr