JDF Studios
https://www.jdfstudios.com/
Replica casts of Jason masks. Need an accurate Jason mask kit? This is the only resource I use when I need a Jason mask blank. His masks are quality ABS and very accurate.
Flavor: costume
Frightgeist
https://frightgeist.withgoogle.com/
I discovered Frightgeist by accident while trying out new domain names. It’s run by Google and measures statistics on trending and potentially trending Halloween costumes. How cool!