I own a 2004 Beneteau 323. I need either a gasket for or a new Lewmar portlight sized 25.5 X 7.5. As I read the manufacturer's table, this is (probably) a size 4 New Standard Portlight, However, when I click on this particular model, I am asked whether I want a white or an ivory color. My current portlight is aluminum on the outside and aluminum on the inside--there is no color. Am I missing something here?