Wow these cost a lot less than I would assume.
https://www.turnbullrestoration.com/product-category/the-showroom/turnbull-finished-firearms/?filter_model=mark-iv
While Im not recommending this as a motorcycle helmet, I am saying it's an option.
https://www.thegreentanners.com/collections/military-helmets/products/tanker-helmet-m1938
I actually really like this font. https://www.jsanilac.com/mind/
Amateur Boolit Farmer,
Memesmith,
Pro-Privateering