As mentioned before, I modified a Black Series Helmet. I used wood filler for the battery compartement and speakers. As I had to color-match suit with bucket I repainted most of it and since the blue stripes on the tubes where too finicky to mask, I just cut some new in vinyl and just stuck them in.
For the inside I gutted every unnecessary bit of plastic, removed the nose bridge and added some foam padding. It's still a bit too loose for my liking, but I might just add some more padding. I painted and wedged a bit of metal web into the frown.