I've got an 05 side window visor that I was going to install in my 04 but didn't get around to it. This is the new 05 piece that goes above the side window on the driver's side.

$20 shipped or free with either the armrest or the mirror covers I have for sale.

 

Do I even have mounting spots for it in an 03?

If so, then that would be great. I do like it on my wife's 2006 Cooper. . .

 

You'd install it with a nut/bolt/washer. It was installed in a 04 that way without any problems.