Call them (or email) and ask if they can do a staggered setup and also ask if they have any other offsets available. 35 mm front and 22 rear. You'll need spacers to make up for that big difference in the rear.

There are a number of wheels that look similar those. Do an eBay Motors search for "wheels 5X112" and/or "Mercedes Fitment".

You'll get buried in choices, but that's how I started to look. After a day or two, you'll get very good at it!