Have you considered the Wrangler Overland rims?
If they clear the callipers there offset/back spacing is more shallow moving the rim away from the suspension and may provide you with the clearance you need for the bigger tyres.
Not the best looking rims (I would paint them black) but 18 inch and hub centric.
http://www.ebay.com.au/itm/170989484...84.m1423.l2649