Bob Drake sells (or at least he did) the correct '35 passenger car straight arm hinge mount mirrors. I have bought several sets. These are NOT the same as pu truck mirrors because the part that fits the outside hinge is a different length.
Drake catalog info.....
● Straight arm, repro of original used on '35 pass.car, pn 48-18403-E, 2-1/4" hinge mount bracket
● Straight arm '35-'47 pickup truck, pn 50-17741-B, black painted arm, 2" hinge mount bracket
● Straight arm '35-'47 pickup truck, pn 50-17741-C, chrome plated arm, 2" hinge mount bracket
● Curved arm that fits '35-'40 pass. car, pn 48-18403, 2-1/4" hinge mount bracket
ps....the actual round mirrors that come with these outside hinge mount mirrors are rather small in diameter and somewhat difficult to see with to the side or rear of the car. I have found larger diameter mirrors that will work on these arms that came from one of the well known chain auto stores, but can't remember now which one.