I really like these OEM door mounted mirrors.Here are towing/camper mirrors that came stock on some trucks. You can flip them around and turn over to give more length. Some don't like the look but they give pretty nice visibility. Not sure if they are made anymore but plenty of people get rid of them so there are likely used ones out there.
You must be registered for see images attach
I picked up a set nearby for 60$ but still haven’t located the covers/fill panel where others mount up (he tossed his). so if you go this route make sure you get those with the mirrors.