None of the 5 cars I’ve driven on a regular basis have had anything that I would consider a “blind spot,” but maybe my definition isn’t the same as yours.
Many people adjust the side mirrors in a way that shows them quite a bit of their own car’s body (and I used to do that, too). But it’s a waste of mirror space; you’re better off adjusting your side mirrors outward a little further, so you can’t see your own car in them at all. In my cars, setting the side mirrors this way has always given plenty of overlap between the rear-view and the side mirrors, and sufficient overlap between the side-view and my peripheral vision. I tend to check over my shoulder anyway, because it’s an old habit from learning to drive. But the mirrors don’t seem to lie.
And if that still doesn’t satisfy you, you can get a stick-on plastic chrome bubble mirror at an auto parts store for about $0.89 .