BGM Big Gold Minting. Well worth a look if you buy modern gold commemoratives http://agaunews.com/cits-new-pope-francis-coin-showcases-groundbreaking-big-gold-minting/
this is pretty cool.. especially for the 1/20, 1/10, and 1/4 market. Reasonable cost and you can see the design! The only question is how fragile these will be. I would venture to say, these will likely need to be encapsulated somehow.