Whoa. You get thousands of cool-points for even thinking about taking on a project like this!
Those spiral-shell shapes are molded somehow...blow molded, maybe?
What you've got there are three separate chambers; good for acoustic separation...no need to "box in" the tweet and the mid from the back wave of the woofer. Definitely different looking! Not my cup of tea, but kudos to you if you can pull it off.
