On-Stage UM-01 Ball-Joint Adapter for U-Mount Tablet UM-01 B&H
Amazon.com : Ball Joint Mount for ActionCam Handlebar, Helmet, 360 Degree Pivot/Swivel, Water Resistant, Flexible, Lightweight, Durable, Sturdy and Secure, Compatible with Most Action Cameras : Electronics
Camera Accessory Mount to Hot or Cold Shoe with Mini Ball Head - Multi-Function Swivel Joint with Removable Cold Shoe Mount for 1/4"-20 Male Studs – Fotodiox, Inc. USA
6" Heavy Duty Double Ball Joint Backup Camera Monitor Mount