David Clark makes a hard (pieced) helmet that adapts to any of their
headsets. The model # is K-10, and it's pricey.
A ProTec, while you may be able to hang your headset on them, are not
made for aviation use. Don't waste your money on one (unless your head
is only worth $15!).
Bill

David Clark makes a cloth helmet.

Go to a sporting goods store and look for a skateboard helmet. We call them
Pro-techs...I picked mine up for about $15, and slapped an NVG mount on it,
for night E&E. You might be able to mod it to fit a headset...
...and they aren't just for Delta

Brad B.