More Aerodynamic Mirror Options?

[littlebunnyhead]

https://imgur.com/GCidImU

My partner and I just bought this bus (hopefully that image works? first time posting an image in here!), and are looking for tweaks we can make to improve the aerodynamics and fuel efficiency.

First stop, we're removing the roof deck *sigh*

But the huge mirror arrays definitely create a drag, too. Has anyone successfully swapped out their mirrors for something a little simpler?

We have a backup camera, and I didn't find the fisheye mirrors to be super useful, so I feel like all we really need is the normal side mirrors. Just wondering if it's even possible to have mirrors that work without having to stick out so far and be so huge.