Did you ever find a solution to your mount for the Kia? Have a 2011 myself, and am looking to put a simple external antenna on it for my 2m/440 HTs. Just something basic to hit my local repeaters, tune in NOAA WX radio, etc.
Thinking about a lip mount on the hood/back hatch. Don't want to drill, would rather not do a magnetic mount (had one on another car before, led to fading/circular patterns that I am not interested in). Interested to see what you came up with.