Best Buy: Oculus Sensor for Rift Virtual Reality Headset Black 301-00064-01
Looks like H&M makes Oculus Rift sensors : r/oculus
Sensors | Free Full-Text | Comparison between Full Body Motion Recognition Camera Interaction and Hand Controllers Interaction used in Virtual Reality Exposure Therapy for Acrophobia
Sensor Mount for Oculus Rift – Glistco
Oculus - Rift S PC-Powered VR Gaming Headset - Black, Two Touch Controllers, Fit Wheel Adjustable Halo Headband, Motion Insight Tracking Sensor, Bundle with 10Ft Link Cable - Walmart.com
Two “inside-out” VR headsets, reviewed: The $400 Oculus Rift S, $600 HP Reverb | Ars Technica