Given their importance I fail to see why a few $$ is important. The DODGE Towing mirrors I added to my 3/4T still aren't as good as I would like (then again, neither are the FORD or Chevy OEM offerings).
I will probably add CIPA
replacements to mine as the 10"x10" offers the best field of view I've yet seen.
And probably add MULTIVEX
overlays as I did on my last truck.
Frankly, when towing, what is behind one and coming on is the future
and can be more important than what is directly in front of one.
Don't cheap out on mirrors.