Amazon has opened pre-orders for the Mobile Suit Gundam Full Scale Works Earth Federation Army Helmet 1:1 Scale Replica. The product stands at around 9.84 inches tall, is made of ABS plastic and comes with a removable visor. If you are interested, you can pre-order with the following link from the online retailer:
You can also check out an image of helmet located just below this paragraph (more photos can be found in the aforementioned listing).
According to the product page, the replica is coming out on March 4, 2021, in the U.S. region.