I haven't looked into it that much, but I'm fairly confident if you you shall find. The biggest factor in doing in this is likely to be what type of car you have, or more particularly what mechanism the heater and vent controls use.
A/C is easy - it's just a switch. Fan control is generally straight forward. Heat and vent control can be a bit trickier - if you're lucky they may be striaght forward electronic controls, or it may require a pushrod needing substantial force, or even trickier, like my Jeep, vacuum controls.