Arkham Knight Wearable helmet

3D Printing: As mentioned earlier, some talented fans and 3D modelers might have created 3D models of the Arkham Knight helmet that you can find on websites like Thingiverse or MyMiniFactory. If you have access to a 3D printer or a local maker space, you can print the helmet yourself or commission someone to do it for you.

Cosplay Communities: Check cosplay communities and forums online. Cosplayers often share their costume creations, and someone might have made an Arkham Knight helmet that they are willing to sell or provide tips on how to make one.

Custom Prop Makers: There are professional prop makers and costume artisans who offer custom-made replicas of various fictional helmets and accessories. You can search for such artisans and inquire if they can create an Arkham Knight helmet for you.

Convention and Comic-Con Events: If you attend conventions or comic-con events, you might find vendors selling cosplay items, including helmets based on popular characters. However, availability can vary depending on the event and vendors present.

Remember that when purchasing unofficial fan-made merchandise, quality and accuracy can vary, so it's essential to do your research, read reviews, and check the reputation of the seller before making any purchases. Additionally, be aware of any copyright or licensing issues related to the merchandise you're buying.