Hello, I'm new around here... was just browsing and found your post.
I own a few real chinese coins. eBay is the best place that I have found. What I do when I'm looking is browse --> Coins & Paper Money --> Ancient --> China --> then look through the pages of coins.
When I find something I like, I open it in a new tab and look to see if it meets my specific needs: diameter and thickness. 32mm for half dollars, 38mm for dollars, and that it's a thin coin. A lot of real chinese coins tend to be very thick and have deep depressions in them.
Hope this helps. Good luck.