Just search for the XFX brand,I think it is the only one available as new in China.A few friends of mine bought in bulk like 25 of them to build their mining rigs.They found them through Alibaba and of course they had a contact in China who sent them the cards,you should NEVER buy through Alibaba without having a contact in China as the risk of getting scammed is really high.

But yes for the other brands most of them you cannot find new anymore.