Local laws where I am do allow a passenger car to have only an interior main mirror, but there are also design standards for newer vehicles which are referenced by road-worthiness tests (in other states this info is available on the net, in my state it isn't explicitly stated though), and current design standards require exterior mirrors on both sides
Not wanting to get the boys in blue too narky, and actually finding the side mirrors quite useful in any case, I'm looking to create an aerodynamic set of mirror housings (one of my one-day-when-I-don't-have-a-million-other-things-to-do projects that keep piling up
) using some blue styrofoam scrap and spare fiberglass/epoxy.
So, I recently grabbed a pair of these, which are right on the design standard minimum height and only about 2cm wider than the minimum height:
F1 Design Carbon Style Racing Sport Side Mirror X 1 Pair Left AND Right | eBay
I'm thinking of something a bit like this - apparently they've patented the rear box cavity "on a rear-view mirror" in much the way other companies patent rounded corners "on a mobile device" (sigh) but I'm sure playing around with stuff in my shed will be fine
