This site might help you a bit, just set the stock and desired parameters for wheels 1 & 2 respectively to get a line drawing rendition of the outcome. The only figure I didn't know since I'm still waiting on my car is the hub-to-fender measurement. I calculated it by subtracting the offset from half the rim width (in mm) and then added 15mm based on that excellent Perrin write-up on the car where they actually measured that. Not precise, but close enough for some rough modeling.
http://www.jonathanrowny.com/page/offset-calculator