I picked these Zombie bits up from David’s Emporium in Hamilton. The outside layers appears to be a flexible plastic or rubber (not latex), like some masks are made from. Appear to be durable. They are soft foam filled without a core, in other words LARP safe, maybe even safe enough to throw.
I have 4 of the longer limbs (20-30cm) but you can get feet and hands only. Neat huh?