I also have an SSB coupe, and the thought of a yellow rectangle sticker on it gives me the *******.

That aside, I assume you have to have it so think about this; get some sign vinyl in a matching yellow, 2 " wide, and run it full width across the bottom of the window. Then apply the yellow rectangle to that. Or from the same sign source have them create another yellow sticker, the same size, with a crossfire logo or something similar, for the opposite corner of the window.

Either way, you'll keep it more symmetrical than having one ugly yellow wart on one corner.