Well, since no one has told me to keep my insipid ideas to mayself (yet):
I live in SF, which likes to brag about having "the largest Chinese population outside Asia", BUT: I never go to Chinatown for shopping - there and 100's of tiny storefront shops stacked to the ceiling with just enough open floor space to navigate.
These places do not pay the outrageous rents in Chinatown. This makes the goods cost about 50-70% of the Chinatown prices (yes, the Grant Ave corridor in Chinatown has some of the most expensive rents in town, so the mark up is unbelievable.
Add to that the fact that Chinatown merchants live and die on the tourist trade, and selection is very limited.
So, if you want an authentic asian shop, look in the neighborhoods.
p.s. - completely OT: the reason Chinatowns exist is that, by law, persons of Asian extraction could not buy any real estate outside a designated area.
This pretty well guaranteed that such properties commanded premium prices.