Can someone please tell me what would be the most cost effective way to make my own harmonica coverplates? The metal is 0.025 thick. I have been to several machine shops and they have been no help. They all say Im going to need 10's of thousands of dollars. Could this be done in 1 shot or do I need a set of progressive dies? Can I make the original from plaster or something then have it cast? I have read tons on the net but am still at a loss. And please! Dont say out source to China. Here is a pic of some custom harmonicas I make. Dont know if this is the right forum or not. THANKS!