I was in Shanghai in Feb this year and tried several places... only found one little room with some decent pams... with the old style 6497, asking price is about $500. That's about it. You will not be able to find stuff that our dealers sell here on the board.
However if you go to Beijing, I was able to find a couple of PAM111s at a local market called "YA XIOU" and I paid about $80 each, they are the newer style with CN6497.