Sanus Advanced Soundbar Mount Fixed Indoor Wall Speaker Mount Fits TVs up to 102-in (Hardware Included) in the TV Mounts department at Lowes.com
Extendable Soundbar Wall Mount Designed For Sonos Arc Sound bar
Sanus Sonos Arc Extendable TV Soundbar Mount Black BSSATM1-B1 - Best Buy
Extendable Soundbar TV Mount Designed for Sonos Arc Sound bar
Amazon.com: Sanus Soundbar Mount For TV Mount Bracket - Height & Depth Adjust, Moves In-Sync With TV, Supports Sound Bars Up To 20 lbs - SASB1-B1 : Electronics