I know you said you don't need wireless charging but I bought one of these and have been quite impressed. https://www.amazon.com/TORRAS-Wireless-Charger-Auto-Clamping-Compatible/dp/B07B4C6RJ3/ref=mp_s_a_1_2?keywords=galaxy+s9+plus+car+mount&qid=1550598043&s=gateway&sr=8-2