GoPro Replacement Lenses for Hero3/3+ Black from Peau Productions by Jeff Foster - ProVideo Coalition
GoPro - Lens Replacement Kit for HD HERO | 26bikes.com Shop
Amazon.com : Suptig Replacement Waterproof Case Protective Housing for GoPro Hero 4, Hero 3+, Hero3 Outside Sport Camera for Underwater Use - Water Resistant up to 147ft (45m) : Electronics