That's the hybrid plastic stuff.
Strong blade used to carry it but it seems they only carry plastic helmets and such now (like museum replicas)
This is a link to the only retailer i could find with what your looking for.
(Altough the styles might not be what you want.) I hope it helps!
www.by-the-sword.com/c-326-larp-armor-hybrid-polyurethane.aspx
EDIT: This stuff is just about as expensive as the real thing.
