I am a fan of Fifth Element, but it seems that Fifth Element merchandise is hard to come by and what you do find out there costs a small fortune. You can easily pick up some stuff like the multi-pass, but the rest of the props just don’t get replicated as often as a lot of popular movies, perhaps because a lot of the props could be from almost any movie and they just don’t stand out well on their own.
One prop, or actually props, that is very identifiable are the stone pillars. While surfing around I found this great Instructables on how to make your own stone pillars, and the best part is that they made it a functional display piece by turning them into candle holders. Check out this awesome instruction by antagonizer.