You can either look on Taobao (it's like china's ebay). It's all in mandarin though so if you don't read/write it, you will need to get someone to help you. Taobao is awesome- you can find almost anything on it!
Another option: if you want to order from the US and they won't ship to China, then you can use a service like Comegateway
I've used them many times and they're fine. They provide you an address in the US- in Portland, OR, and...