Bullion is non-ferrous metal that has been refined to a high degree of elemental purity. It ordinarily refers to bulk metal used in the production of coins and especially precious metals such as gold and silver But hey here are some bars maybe these will float your boat.
I know this post is a year old but I am just scrolling through it now and I saw your coin. Awesome piece, the Simpsons is one of my favorite TV shows. I've been looking to get one recently. Doh!