This has to be the best way of going about it.
It clips over the hazard button and vent controls without blocking anything (even the buttons underneath are accessible).
There is a bit of a disconcerting wobble, although I don't think it will be a problem, and there is a lot of maneuverability in terms of how it's positioned and the size of phones it can accommodate (touch sensitive arms).
Unfortunately, I assume (especially with the blatant copyright infringement) that this unit isn't sold outside of China (or maybe on Aliexpress?)