I have spent over a year searching for good quality towing mirrors for my 2007Ford Explorer. During my search, I used the less than impressive suction cup mirrors. These kept falling off if the truck mirror wasn't perfectlly clean or if it was too windy. Also, due to the different shape of the Explorer mirror, most universal mirrors did not fit/attach properly.
Finally, I have found a universal mirror that is stirdy and strong that won't fall off. I have never seen so far behind my trailer before! These mirrors are a must have!
Here is a link to the company's website:
This is a British company, but I managed to find them in the Ottawa, Ontario (Canada) area at Primo Trailer Sales.