Towing Mirrors

Angel

Hi All. I wonder can anyone help me. Iam trying to find towing mirrrors to fit my car. It is a 2007 E Class (W211)  Mercedes. I have a set of Milenco Aero mirrors which  fitted my previous Merc but unfortunately do not fit this one due to the mirrors tapering
down on the inside so the clamps will not go in. Any help or suggestions would be greafully appreciated.