Bike smartphone holder replacement part

As a frequent bike user in the Copenhagen's great bike-lanes network, I need a water resistant smartphone holder, especially when I am not familiar with the route! I bought this https://goo.gl/J16s3A from AliExpress a few years ago and I am totally pleased with the quality. However, recently I broke the part that tightens the case to the handlebar mount, making this useless. But...

...with careful measurements and a 3D printer is (almost) everything possible to be created!

Again, as in eve