This sounds great but I'm running into the issue that shops here won't install items they haven't sold. Which is why I was thinking of a wireless one which I could probably do myself.

Of course, I'm also playing with the idea of getting a whole new head unit (with Car Play) but Best Buy et al have very high prices (lots were on sale pre-Christmas, but not that I am finding now) and a backup camera (in which case I'd have to have a professional install).