Conversion w221

The following problem ; I ordered the AMG styling with my S-class and it is too late to cancel. Now to my question : Can other tuners (e.g. Carlsson, Brabus,Asma etc.) mount their front spoilers and exhaust systems despite the AMG styling or is that not possible ? Maybe you know bike, because I don’t want to call and make the impression as if I have no idea of anything (is always a bad negotiating base) . Thanks, Vitares