That should work, mounting it being the tricky part. If you're going with something like that though, you should be able to buy those (maybe for less) at any large auto parts store. The one by me sells smallish generic side mirrors for $10-15. If you want something easy to mount, there are the OEM non-telescoping mirrors, they'll just bolt right up.
Here's the
passenger mirror, they're more expensive, but it's also OEM fit. Not sure how big it is, though it looks smaller than the telescoping mirrors.