Here's a picture of the Pro Clip for the right side (someone earlier had one for the left "A" pillar one).
They aren't cheap, but there are specific holders for many many devices, and the base mount is vehicle specific. I've been using them for about a decade.
SR #265 | "Quia currus certatus, inferius"
13 Focus Ti Sedan w/Handling Pkg, MFT Sony 10 NAV, Leather
13 Focus SE HB Sterling Grey, 201A, Leather
06 F350 6.0L DRW King Ranch, Sunroof, Rhino Bed Liner, 4" MBRP Turbo Back, AirRaid, Edge Chip w/Pyro