I'm looking for a 'bang ring' to help disassemble some magician's coins (half dollar) that I've found over the years. (The coins are currently apart using the glass jar method, but I'm looking for an easier way) eBay and Amazon have them for ~$7 or so... does anyone know of a cheaper place? They have to make these in China or Hong Kong or somewhere... https://www.amazon.com/dp/B002SOTQWO