Stacked Despard Toggle Switch Set Two 3-Way + S/P 15A - White
Hubbell 15-Amp Single-Pole/3-Way Combination Light Switch, White in the Light Switches department at Lowes.com
3 Way Decora Light Switch, Paddle Rocker Residential Grade 3 Wires Grounding Screw Single Pole 15A 120V/277V UL Listed Micmi (3way, with wallplates 10Pack): Amazon.com: Tools & Home Improvement
Leviton 15 Amp Duplex Style Single-Pole / 3-Way AC Combination Toggle Light Switch, White R62-05241-0WS - The Home Depot
Add a Single Pole Switch to 3-Way Switch System - YouTube
Smart Light Switch 3 Way, WiFi Light Switch Single Pole or 3-Way Switch Alexa | eBay
10 Pack] BESTTEN Dimmer Light Switch, Single-Pole or 3-Way Dimmer Switches, 120V, Compatible with Dimmable LED, CFL, Incandescent and Halogen Bulbs, Decorator Wallplate Included, UL Listed, White - Amazon.com
Triple Switch Dual Single Pole + S/P or 3 Way - Light Almond
Wiring a single pole switch next to a 3-way switch - Home Improvement Stack Exchange
Smart Dimmer Switch 3 Way Smart Switch 2.4GHz Wi-Fi Light Switch Compatible with Alexa and Google Home, Needs Neutral Wire, Single-Pole: Amazon.com: Tools & Home Improvement
Single-pole, double-throw (SPDT) A.K.A. The 3-way switch – Basic Lighting for Electricians: Level 1
Adding a single-pole switch to 3-way switch | DIY Home Improvement Forum
How to Wire a Three Way Switch to a Existing Single Pole Light Switch Circuit. - AskmeDIY