I'm liking my new aspire nautilus and can't wait to try the new bvc. I'm thinking about picking up another one, but I like the look of the nautilus much better with the hollowed out replacement tank. To avoid having to buy another nautilus and a separate hollowed out tank, I was thinking it might make more sense to just buy the replacement with a replacement base. I looked but couldn't find any replacement bases anywhere. Does aspire sell them? Anyone seen them? Thanks!