Lutron MSC-AS Maestro (satin) 120V Companion Switch – Ready Wholesale Electric Supply and Lighting
Lutron Sunnata Companion Switch, only for use with Sunnata On/Off Switches, Slate (ST-RS-SL), Grey - Yahoo Shopping
Lutron MA-AS-BL Black Maestro 120 Volt Companion Switch - LightingDirect.com
Lutron Maestro LED+ Dimmer Switch Kit with Companion Switch, 150W LED/3-Way or Multi-Location, White (MACL-153M-RHW-WH) MACL-153M-RHW-WH - The Home Depot