It appears that just about everything in that brochure is an aftermarket accessory. Personally, I'd request a wheel swap via the dealer (and their parts department) as a condition for selling me the car, negotiating a fair trade. Some of the 124's have been sitting around on the dealer's lot for quite some time now, and they might be willing to negotiate. I actually did this once a few years ago.
Another option is to keep the stock wheels for a year or so and then sell them. By then, plenty of drivers will have scuffed up their original wheels and you may get a good price.