2009 2500 tow mirror problem

Have a hole in my tow mirror cover and would like to fix it. I am having no luck finding the tow mirror arm cover and it’s looking like I’d have to buy a whole mirror assembly. Can anyone point me in the right direction for a cover?

Have a hole in my tow mirror cover and would like to fix it. I am having no luck finding the tow mirror arm cover and it’s looking like I’d have to buy a whole mirror assembly. Can anyone point me in the right direction for a cover?