Right after Double Helix was released in 2018 my son wanted to dress as him.
You can see some of the results at https://retrotechjournal.com/2018/11/04/diy-fortnite-double-helix-costume/
This mask uses the adjustable band from a $8 magnifying visor to make this rig tilt up, and be comfortable to wear:
It also used the red lens out of these sunglasses to provide the main red lens:
There is a modest amount of glueing involved. The EarTabNewer allows the mask to work with the given head band, and you need to print 2 of them one mirrored, and glue them into the main helmet. Also the Forehead Pad glues onto the top. I used JB Quick for both if these glueing operations.
At least on my son this mask is slightly larger than the original Double Helix mask, but it had to be this big to fit the headband. For Halloween I didn't have time to track down some more red lenses for the rest of the mask, but that should be fairly doable. Any curved dark red plastic/glass that can be made to fit.
I just used the right side/font view of early Double Helix images of the hemet to model this.