Hi Matthew, Welcome to FISD.
I would suggest for your project of Rogue One (R1) Stormtrooper Helmet to check the following forum section abour the armors (Helmet if the vendors sale it separate) and the optional Black Serire R1 Helmet modification .
=== ROGUE ONE ARMOR ===
Type: Jimmiroquai
Country: PI
Contact: email jimmiroquai@yahoo.com
Kit: Kits are lightweight flexible fiberglass.
Availability: PM to ask, varies
Assembly: Fully trimmed and partially assembled, e.g. if it fits out of the box one can go straight to rigging and painting.
Comments: No issues with quality or service reported to date.
Feel free to ask questions, we are here to help.
Cheers