If its just flat or slightly curved, I imagine you could get a local custom machine shop to CNC one based on scanning in the one you have and pounding it on curved surface, unless you've got crazy dimples on such on it that would be hard to reproduce without a mold or die/stamp. you'd probably also then have to get it plated silver/gold or whatever color. Just try calling around.
That said, I'm sure it would end up being your most expensive lure (maybe $50? the labor is the killer); unless you have friends in the biz that could do it as a favor, then it probably would just cost you a couple of sasparillas later that evening.