Did you ever go with this project? I find myself down in your area every-so-often if you'd like to see my bumper LEDs. In that project from 2009, Adam used the clear lenses (with red LEDs) on his silver XK. Damn, I keep changing this post. Anyway, here is a link for some chrome bezels to cover the rubber grommets.
BTW Matt, if you PM me your phone #, I'll give you a call if I'm around your way this weekend.