Based on this product's specifications, here are some alternatives and similar models
Protective bumper HOCO Blade Series for Apple iPhone 6 / 6s, metal frame, black
Summary description:
HOCO Blade Series protective bumper designed for Apple iPhone 6 and 6s. Metal-frame construction in black provides edge protection against bumps and scratches while keeping access to buttons, ports and camera. Slim profile preserves the phone’s dimensions and grip. Suitable for everyday use to reduce impact damage and maintain device appearance.