Expanded Edition BacPac Frame Case For Gopro Hero 3 Hero 3+(Camera+LCD/Battery BacPac ) Mount Accessories - AliExpress
Amazon.com : SOONSUN Standard Waterproof Case Dive Housing for GoPro Hero 4 Black, Hero 4 Silver, Hero 3+, Hero 3 Cameras with BacPac Backdoor for Extended Battery or Bacpac Screen – Waterproof Up to 40 Meters : Electronics
Amazon.com : GoPro Battery BacPac for Hero3+ : Electronics
GoPro Battery Bacpac for HERO4, 3+, 3 (ABPAK-401) at KEH Camera
GoPro Battery BacPac for Hero Motorsports Action Cameras