Heater control rebuild?

a few places to start. some of these sell parts, some do restorations. google the crap out of subject and you'll be reading for days...

good luck

http://www.70duster440.com/misc.html

http://www.1962to1965mopar.ornocar.com/restoration-sources.html

http://board.moparts.org/ubbthreads/showflat.php?Cat=0&Board=Deals&Number=6065409&page=0&fpart=1

http://www.mrheaterbox.com/heater_controls.htm