Can't seem to find wifi for the bizhub c458,c558 copiers. Cannot use anything else like range extenders do to the security on wifi. The wifi on these machines when they bring them is connected to third usb port from front to back. They come with the 8 series and also 7. 308,458,558,658, 227and so on. If you have one or know where I can purchase one please pm me. I'm in need of 6.