It appears that you never received a reply. The LuxLink works great but I never heard of the back seat cover; Did you ever learn anything more about it?
My current task is removing the "L" from the front and back but it is a bit more involved than first meets the eye.
Well, I just recently posted so I'm still hoping to hear something on some of these.
I've seen the back seat cover. It's typically called a 'soarer parcel shelf', or a 'soarer rear shelf'. It's absurdly expensive (~1k) apparently, but it does look pretty good, and I think it's actually a sort of storage device as well as a way to make the rear seat disappear in a nice way.
I've heard good and bad about the LuxLink, mostly good on the product, some bad on the dealer response and a bad install or two. But the worst is that it's not available at the moment. I'm hoping enough people are still looking for it that we can get another run of it.
Good luck with the L removal. I'm fine with them.