BC Fiber is a company specializing in optical pigtails and patch cords , as well as various types of optical connectors and modules (SFP, LC, APC, etc.). The factory is located in Vietnam, and has several representative offices in Europe. Their site is http://www.bcfiber.eu.
Takfly (www.takfly.com.cn) is a China-based company that manufactures various fiber optic equipment, like media converters or SFP modules compatible with various manufacturers' products, such as Cisco, Huawei, Ericsson and so on. If you need a SFP module for some device that you can hardly find on our market, please contact us, maybe Takfly has it.