Winter wheels and tires: NOW: wheel bolts!

I haven't yet dared to ask the Mercedes dealer what the price of twenty of the spare wheel bolts would be, but that appears to be the only real way to get the correct bolt. I think the dealer would order twenty of them for me although they would be ordering by my car's VIN which is the way they do things. I wonder how much the bolts might cost?
My goal is to maintain this car to a 100% OEM standard as best I can which is why I bought the wheels form a tuner in Germany. They do not have appropriate sized bolts at this time though. Any thoughts? I need to get the winter wheel/tire combination on the car early in November.
Thanks



One nice day next week I'll have a drive to Portsmouth and back and the new tires and wheels will be on the car by that weekend.


