I'm looking for a helmet similar to the one used by George Hanson (Jack Nicholson) in Easy Rider.

Is this "style" of football helmets called something in particular? I'm not concerned about the color, but the particular shape, which seems a little different from modern football helmets (bulkier, especially the protruding areas by the ears, where I'm assuming the chin/mouth protector would normally be attached).

Any clues as to where a helmet like this might be acquired will be awarded with points.

Lastly, just because it's awesome.