Looking for the best recommended replacement pull chain fan switch. I live in Manhattan, New York City, - My Zip Code is 10014.

My Casablanca - Well Tec E116997 - Pull Chain Fan Switch needs replacing.

(Four wires; 1. Blue 2. Yellow 3. Black, & L/Lamp - Brown)

Sounds like a 3 speed fan switch. Match it up at HD, Lowe's or any electrical supply store. Very common switch.