This post is incredibly helpful. Thank you!! I had never heard of Sewell parts, it certainly seems like it will be a great resource for me to purchase the bumper cover and perhaps even beyond that… Although, I will definitely look into a used cover, maybe I will get lucky and find one in good condition.
And yes! It's true, I've seen many other white LS 400 and not too many darker ones. AZ is hot enough without rollin in a heat magnet haha.
Thanks for the diagram! Very helpful to know which parts are distinct and their part numbers to search. The trim really is expensive! $129 seems rather steep for something that is mostly cosmetic. I will definitely look into your suggestion. I'm curious, did you replace the trim yourself? If so, how did you go about doing this?