clubchamp98
Journeyman Pro
thanks for lookingI googled it and found this: https://www.ribcap.com/collections/summer/products/ribcap-soft-protective-helmet-baseball-chin-strap
It doesn't look great, but maybe if you take the chinstrap off you'd get away with it. Seems pretty expensive as well.
Not sure a soft foam one would stop a golf ball impact.
I might have a go at making one myself ,thin sheet aliminium or a abs plastic.
Give me something to do.