Model originally uploaded to Thingiverse at https://www.thingiverse.com/thing:2397431.

The handlebar mount provided with a well known GoPro-Clone (left part) is designed for a handlebar with 22mm diameter. No chance to fit it to a 32mm handlebar. With the uploaded part (mounted in the first picture) the holder now can be mounted on a 32mm handlebar.

Edit 2017/08/07: V2 with additional fillets for higher long term stability added