Woh, those are cool.
I have a router. I'm also decent at figuring out jigs for tools. I could build some jigs (and make plans for others) to route something like a plaque, I'll bet.
I could make them out of polyethelene (natural colored industrial plastic) because it's durable yet easy to work with. It would take the small indentation for the label smoothly and buff well. It's kinda ugly though, I don't know if they make it in black. I picture all but the outside 1/4in covered by a label anyway. It is some pretty slippery stuff, also.
I would probably make them so they fit into KEM setup boxes for travel.
Hmmm.... sounds like it might be a plan. I'll post here if I end up doing anything.