Yeah, thanks to the poster who included pics. that is way cool.
seeing the pic, i'd say to stick with your beemer's key case. I think they provide one which is about $30 retail price.
With luxury cars like lexus, bmw and benz, their keys are thick and specially designed. They're kinda hard to fit into any key case, clef, etc. and even if you CAN fit them in without looking overly silly, you still have 1 or 2 housekeys, mailkey, office key, whatever key. That's a whole lotta keys to be fitting into an LV