to fit a 2010 S4. I think I'd prefer 18" wheels for the winter set. If tires are mounted, all the better. For the spare, I'm hoping for a 19" double spoke (i.e. to match the Prestige trim set that came on the car).

I'm in the SF Bay area, near Oakland, but often get up to Reno, through Sacramento. Nearby any of those would be super duper.