it's 1/16" craft foam , you can get it at the local craft store in sheets. I'm presently making front wheels for the guinea pig out of sheets of 1/4" black foam as the wheels they sent me are like 1".....no way they will roll where i fly! and they don't stock 1.5 wheels in the store currently.
Also, all my pilot figures i downloaded from the thingyverse web site in my last cockpit comment. not all were meant to be air craft figures but it's easy to just cut off any figure you want at shoulders and make a pilot out of them. I use a free program called MeshMixer.