i called the number on the bottom of the webpage at carbon helmets... it's a month wait for any helmets since they are on back order and are hand-made.
on top of that, i asked the kind lady on the phone what the difference in her novelty and dot helmets and she kindly explained...
the only reason the novelty helmet was not approved for their helmets is because it failed only 1 of the required dot tests. they dropped a 7 pound spear from 10 feet in the air and the spear penetrated the helmet. there are testimonials of the novelty helmet saving folks' lives. i guess if someone were to throw a spear at me while i were driving down the street, i'd have more to worry about than the safety of my lid.