I use the Rennline lower mount, and I found the ball matches the socket of an Amazon wireless charger that I have in all of our cars, so it works perfectly:
The mount I used can be found on Amazon by searching for 'YITUMU Wireless Car Charger,15W Qi Fast Charging Auto-Clamping Car Phone Holder, Air Vent Windshield Dashboard Car Phone Mount,Long Arm Suction Cup Phone Holder for iPhone Samsung LG'
Excuse the dust, I had an HPDE this weekend and have not had a chance to clean the interior.