Can anyone recommend where I can get some KO action man masks / helmets? Or failing that anything a bit bigger i.e. large doll helmets - things like swat masks, gas masks, motorcycle helmets? I'm making some mask vehicle dioramas out of model kits and to go with it wan to make a reproduction of the drivers masks to stand alongside. I'm thinking something like action man masks generally cheap ones I could use for the shape and add bits too

 

I'm a new member so can't post links but try out aliexpress. I don't know what scale figures you are talking about, but if if you search for '1/6 scale gas mask' you will find many WW2 style gas masks for action figures. Hope it helps