I made a set of these custom motor bike helmets about six years ago for a department store in Japan, as part of my PROFOUND label. I’m not sure but I think they made a very limited number (50) of these which all sold out pre-order.
I only got one for my personal collection, despite months of requesting more. I wore it for a while on my vespa…… Until I had a fairly nasty accident, which involved my head and the roof of a car. So unfortunately the helmet I have is no longer ride safe !