I think they sold all the keychains. I just bought one of the CM 50th ones on eBay, with the castle and Tink, so I'm satisfied.
I love Disney merch that has an error. I have a Princesses shirt that has Ariel in a pink version of Belle's dress. I would kill to get the pin of Minnie playing tennis where they forgot to put the eyelashes on, so it looked like Mickey in a pink dress.