 "GoPro Surfboard Mounts (GoPro Official Mount)" "Camera & Photo Accessories - Page 311 | All Tech Toys"
"Mount your GoPro to surfboards, kayaks, SUPs, boat decks or other gear where maximum holding strength is needed. Includes an FCS compatible male plug to mount your GoPro using an FCS center fin socket." 
 "GoPro Rechargeable Battery for HERO3 and HERO3+ (GoPro Official Accessory)" "Camera & Photo Accessories - Page 131 | All Tech Toys"
"This 1180mAh lithium-ion Rechargeable Battery can be used a spare or replacement for GoPro cameras." 