Basic HVAC Controls

[vette427-sbc]

Looking to put together a very basic HVAC system in my car. All I really need is 2 fan speeds and a way to control the temperature (no AC). I only have floor and defrost vents, so no vent selector is needed. I love the way the Vintage Air controller looks, especially its size. But, I dont think that could work for me.
Id really like to be able to control the temperature from a dial using some kind of stepper motor instead of a manual lever and cable system. Anyone know of any system aftermerket or OEM that might work here?

Any better rotary switches (for fan speed) better than others?