KB Electronics Model KBMS-13BV (UR) Variable Speed Fan Control, Panel Mount, Rated 3.0 Amps @ 120 VAC for use with Shaded Pole and PSC Motors: Amazon.com: Industrial & Scientific
KBMC-13 by KB ELECTRONICS - Buy Or Repair - Radwell.com
Supplies Depot: Broan 57V Electronic Variable Speed Control Switch Ivory