There’s a section of Bangkok’s Chinatown called Talat Noi that is filled with small industrial concerns. You go there for steel construction material, hardware and the like. It all seems pretty organized until you get to the streets where the used auto parts stores are. Then things get funky. I have been fascinated by Talat Noi since I first visited it in September. There are scores of stores, one after the other, all selling what look to be the same things. How do all these stores stay in business? How does anyone know what their inventory is? Who buys and…