Smart move to make since it save you the trouble from having to take the hit on wheels with little mileage on them that only get categorized as used.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.