My right hand mirror has taken a couple hits and the cover is really damaged. When I called the dealership, I was informed that parts are not available and a complete assembly is around $584 (part# 68142672AF) plus tax. I wonder if I've got the straight skinny since the plastic cover just snaps on the arm as if they knew it would need replacing from time to time. These mirrors are part of the Power Chrome Trailer Tow Mirrors w/manual fold away option on my 2013 Laramie. I have part of the number imprinted on the broken cover 48334 but the rest (ending digits) were on the part that broke off. Any help would be appreciated!