[Phase]

Originally Posted by aerohead

You could certainly mock it up that way, just to see if you could live with the optics of it.
If you like the mockup, then translate that into a structural metal strut , for safety, and some means in which to 'gimble' the mirror for 'aiming.'
The strut could be streamlined after the fact. and some permanent fairing over the new optics.
Technically, the mirror needs to be tested in the exact location in which it will reside. It's the only place where the local flow will be whatever it's going to be.
As a first principle, the mirror fairings on the 1996, PORSCHE 911 GT1 race car, would be an example of a near-minimum drag form, according to Sighard Hoerner's drag tables. You must consider them in the context of their type of stalk, and mounting location on the Porsche.

i like that shape. just gotta figure out how to mold that to be super small