I think that, if you look hard enough, nearly every large chinatown will have fake goods. Of course, the majority of them will be hidden away... but if you flash a stash of cash ... you might just get lucky!
In terms of watches, definitely the best place is to get them from our dealers. It's probably one of the most popular phrases known to our community, but the watches we have access to here represent about 1% of replica timepieces. Others vary between bad quality, terrible quality, atrocious quality, and a rare sub-category known to the un-privileged connoisseur only as "TTK's Face"... who knows...