The ebay link above is for the rims to a V6 Performance Package (I have a 2013 with these rims on it - they are foundry black which is actually grey).
The GT CS has black rims the op is looking for. Best option is to buy one new from the Ford Parts site indicated above for $400 and have the tpms and tire from your existing put on that new rim.
I do have a set of GT/CS rims from a 2013 with the P-Zero Nero tires with 8,400 miles on them also.
2013 GT/CS - Sterling Grey Metallic, Glass Roof, Eidbach Sportline Lowering Springs, J&M Adjustable Panhard, Roush Side Splitters, 35% window tint and MMD hood struts, GT500 Mufflers