It was just the first pic I found. Here's the bus I ride around town:
southtownerotary.org/wp-content/uploads/2017/07/emx-bus-at-station-1_lb.jpeg
They're on long arms for situational awareness. Scaled down, you might be able to adapt
duckduckgo.com/?q=swan+neck+fender+mirror&iar=images
edit:
Looking for cab corner turning vanes [AKA pillar guides], I found this article:
www.driverknowledgetests.com/resources/reduce-fuel-consumption-using-truck-aerodynamic-aids/ that might be helpful.
Others are internal ducts that look like air scoops and appear to function like an air curtain. They're not full height, just a
central jet [across the door handles?].