Sure, I can try. Currently I am living in Ningbo, Zhejiang Province. I have lived in China for a year now and in two different cities. One was in the far north and although it was a big city, there was very little (that I could find) in the ways of console gaming. However, this city (maybe because it's close to Shanghai) has a plethora of different equipment for sale.
One of the GC knock-offs that I have seen seems to boast a panasonic label. Of course, you've been living in China for 3 years, so you are familiar with the rampant piracy (of logos as well), so that may be bullshit. Who knows? I'll go check 'em out this afternoon.
To be honest with you, I never really paid that much attention to them anyway, because I would rather play with a Light Bright than a GameCube. The only time I have ever really glanced at the knock-offs is when I'm buying PS2 games.