You can use an out front mount and reverse it so the device mount is over the stem. There's also a bunch of different designs available on Amazon, some install to the top 2 stem face bolts, some of those have the ability to adjust tilt. Others mount directly on top of the stem cap, a different model of that extends forward (or rearward) from the stem cap.

This is one design

https://www.amazon.com/Thinvik-Alumi...ateway&sr=8-16