Yep I knew that you don't see beacon lights in the US or Canada, I was talking about something like Cj24 BMW 5, in the attached thumbnail at the bottom of my post.
the only thing is that it has just one beacon light on the left part of the roof (I know, it's german undercover version and it makes sense), but maybe if someone, or even Cj24, could just add another beacon light so there are two of them, that would be cool.
and to answer sgtdonuts, here in italy our military police ("carabinieri") and even state police (actually they use led lightbars and not beacons) mounted new beacon led lights on top of their new cars' roof:
strobes light on that BMW (or any other car, CVPI, taurus or impala) would be great as well though