Those small squarish chrome slider knobs? Those would be super easy to model and batch print. The only difficulty would be the chrome - I haven't found a great process for it yet, but I've seen some stuff on YouTube and when I move into my new place I'll experiment with hydro dipping.
Yep, it’s a little nothing of a part, I got a Classic Air kit and the one they supply to replace the fan blower switch is really a Chevy knob I think.