My TV is a Nissan Xterra, which is as narrow as the Sorento. I have tried mirrors with rubber straps that go on existing mirrors. They shake to much, but that was irrelevant anyway since they were not side enough. I tried another set from CIPA with a straps and a knob that you put on existing mirrors, same thing, not wide enough and even if they were wide, the mirror itself was so damn small.
The winner was a McKesh knock off made by CIPA. There effectiveness is inversely proportional to their beauty. Nice large mirror, easy to put on, stays there steady with minimal shacking.
I'd go with the McKesh or CIPA knock off.
I could not get the McKesh as my dealer did not sell them and the mirrors were included with the trailer, had to try a few until I found some that were wide enough. Of course they made me try all the cheap ones first.
Your challenge is not finding mirrors mount easily and solidly on the Sorento (well, it can be a challenge), the real challenge is finding mirrors that stick out far enough from the TV so you can see behind the TT.