This is what I use:
https://www.amazon.com/Koomus-Pro-CD...gateway&sr=8-4
It is also a CD slot mount. I put the metal plate low on the case of the iphone so I can use it vertically. I have a 5S.
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128i Convertible, MT, Alpine White, Black Top, Taupe Leatherette, Walnut, Sport
Ordered 5/22/09, Completed 6/4/09, At Port 6/9/09, On the Georgia Highway 6/13/09, Ship Arrived Charleston 6/24/09 at 10pm, PCD 7/21/09