I have a catalogue on front of me of a 6x17 camera back, but the address says: Sheng-Xian photography equipment plaza, Da Sha Tou Lu Ying Road, Guangzhou China, tel. (86)20-8375 3238, 8385 2368, 8982 0268
So I think there is a photo equipment plaza there! Good luck! And update us!
Hong Sien