GoPro Hero3 Genuine Replacement Battery Cover –
£5.99 with free delivery to mainland UK.
This genuine GoPro Replacement Battery Cover is ideal if you have lost or broken your original Battery Cover.
Being a genuine product it fits perfectly and is much cheaper than buying a whole door and lens cover kit if all you need is this one cover.
You can get yours at http://www.hobbymounts.co.uk/gopro-hero3-replacement-battery-cover.html