move the rim and tire away from the shock with a spacer.
If you go too far or the wheel is too wide you might end up not rubbing the shock any more and end up rubbing the outside fender during load, or during turning.
http://www.1010tires.com/WheelOffsetCalculator.asp
check on ebay
http://adaptitusa.com/index.asp?PageAction=VIEWCATS&Category=2