My ODST helmet is based on a picture i saw on the internet. Im not sure if its an official variation or not. My helmet is made out of foam and now , i will be collaborating with someone to bring 3d printed helmet. The helmet will have slight changes to add more details to it without diverting from the original ODST look. One biggest change from the original Halo ODST helmet is the visor as you can see in the picture below.
Helmet will be offered in the store soon. All current ODST batch will receive the new helmet.