You might think about donating it to makerspaces across the world. They would take the rings and build great products around them! I know of a new starting makerspace in the Yukon (Canada) that would love to play with these. Checkout yukonstruct.com! :)
This is a fantastic idea ... I was actually logging on to suggest the same!!! I am a member of Kansas City's oldest hackerspace ... CCCKC ... http://www.c3kc.org/ We are located in the United States in Kansas City, Missouri.
The people in our hackerspace won't care if there are visual imperfections ... no... they will concentrate on the technology and discover what can they do with it ... these people have creative minds and are tinkering with all kinds of technology. I would love to have some rings sent to our hackerspace to experiment with!! We are involved in the Maker Faires that are popping up all over ... some of our members travel from one edge of the country to another sharing their projects at these different Maker Faires.
Let me know if you are interested so I can supply our new address. Our group is moving in about 10 days to a new location which will be located inside a university with a lot of students in an electronics engineering program, programming students, networking students ... just to name a few. What a great project that would be to inspire us ... and I bet even attract new members to our club!