Besides the physical stores you can check out, I think it’s worth a shot running a search for “Torx drivers” on the biggest online shopping website in China http://www.taobao.com (in Chinese). I don’t know how to say “Torx drivers” in Chinese, though, maybe just search “Torx 硬盘”. I have done a lot of shopping there and have been able to buy many things that I couldn’t find here locally at the stores, but the things I bought did not include tools for electronics repairs so I’m not sure if you’ll be able to find those. Anyway, just for your information.