I have been unable to find this specific operator (Crank). I've been to my local hardware stores, ACE, Home Depot and Lowes with no luck. Your are my last hope. This crank goes into a Garden Windows (Top) opening.
Casey from SWISCO responded:
March 9, 2015
Hi! I recommend our 39-414 Vent Operator with a 6" arm. Look it over to see how well it matches your sample.