What are you intending to use it for? Reason I ask is Saab 9-5 estates(and others I'd assume) have 2 strips of that in the boot, but its only aluminium so maybe not strong or long enough for what you need. Might be worth a trip to the breakers though.
I'm looking for a couple of lengths possibly about 4m each, depends on stock lengths. Also if possible anodised black, some can be raised but some would need to be recessed flush. I just don't want to fit lashing rings to the floor and find they end up in the wrong places when I have different loads to carry.