Fluidmaster Dual flush valve 3-in Black Plastic Dual Flush Conversion Valve in the Residential Toilet Flush Valves & Repair Parts department at Lowes.com
Fluidmaster 550DFRK-3 DuoFlush Complete Fill and Dual Flush Conversion System
WDONAY 8.27" Height Toilet Dual Flush Valve with Push Button, Toilet Fill Valve Dual Flush Toilet Repair Kit for 10"-12" Toilet Tank,Type-1 - Amazon.com