I have seen a few threads about what to use for a helmet liner and I found a pretty good solution. I picked up an old street hockey helmet from Play It Again Sports, stripped out the padding, and glued it inside. I must say that it looks cool and fits pretty snug. Only cost $8 and the pads fit in perfectly with no cutting. Here's a pic. I do plan on painting the interior eventually, but I just wanted to show everyone what it looked like inside. The bucket is a fiberglass kit from skygunbro.