I can understand why you are upset about this, but listen to the majority of the people on the forums here...they don't care if the model is licensed, stolen, copied, etc...
It's made in China, and you can't do anything about it. I know this sucks, but people here tell me that's just the way things are. I also know that it's probably little consolation, but feel good that they liked your design enough to copy it. Imitation IS the sincerest form of flattery you know!
~Z~