They do make 18 and 19 that's what I am getting. The offset on the rear 19's is 45mm so I have to put in a 10mm spacer. The guy was very knowledgeable on this and I am getting the lugs and spacers with the wheels.

18x8.5 +35mm 66.6 bore center 5-112 mm
19x9.5 +35mm 66.6 bore center 5-112 mm

http://www.usarim.com/18-inch-merced...-s-sl-amg.html

http://www.usarim.com/19-inch-merced...eels-rims.html