RCCL Ship Pins

I know that RCCL doesn't give ship pins (a la Carnival, of which I have several). But as my wife and I cruise more and more, I'd like to brag a bit about the ships we've been on. Is there an "aftermarket" or some place that sells ship pins?

I'd have some made, but it's expensive unless you do it in bulk and I'd have to sell some to recoup the cost which might irritate RCCL. Last thing I need is to get sued by my favorite cruise line.