I prefer to listen to my engine and not be bothered. Makes my solution easy. Doesn't help you much.
Really though i keep my phone in the pouch on my belt in case i have to call for help. I don't know where you could find one now but years ago i had a device on a flexible pole ( like microphone), with a tray you set your phone in and it clamped the sides to hold it. Gave you many mounting choices.