Climate control buttons. Analog retrofit?

[Factory6speed]

I have the digital climate controls. The large rocker button for the fan speed - / + is broken and often falls off. Yesterday it fell down through the ashtray thing below, I tried to get it but failed and it fell further down into the depths of the center transmission tunnel area.

I can barely see it. I think if I put something sticky on a coat hanger I might be able to get it.

But I'm done with this. I don't like the panel anyway as changing from hot to cold is about 65 button presses.

I think this is a common problem, and I looked earlier at repair options and just ended up being confused. It seemed really hard and worse to attempt to repair these buttons.

Is there a good way to fix this short of replacing the entire control unit? If I have to replace the entire unit I believe there is a nice analog one from some rare earlier models with three dials. I would rather just get that and put that in but I imagine this would require some coding and potentially other changes? Does anybody know?