Inline Lamp Switch 2 Pack, Full Range Rotary Dimmer Switch, Black Cord Switch Replacement for Table Lamp, Floor Lamp, Pendant Light, Works with Dimmable LED, Incandescent, Halogen Bulbs: Amazon.com: Tools & Home
Lutron Rotary Incandescent Single-pole Rotary Light Dimmer Switch, White in the Light Dimmers department at Lowes.com
Inline Dimmer Cord Switch - Leviton Full Range Lamp Rotary Dimmer | eBay
Traic Dimmer 220-240VAC for LED Bulbs Dimmer Switch Dimmer Rotary Switch with Aluminum Knob for Table Lamp - China Traic Dimmer, Dimmer | Made-in-China.com