The masks were listed as being added to the store for the Halloween theme, but must have been forgotten because they are not in the store.
Thank you a lot for the report. Im sorry for the situation encountered. As this is a possible bug, please post it under Bugs and Exploits - New World Forums
Please use this section to report any in-game bugs or exploits you encounter and use the following template. Our Dev team will be able to check it as soon as possible.
Issue that occurred:
Time and Date:
Location where issue occurred:
Any steps that can be taken to reproduce the issue:
Thank you in advance.