You don't necessarily need to connect the 880 to the PC to load the WiFi driver - you can just put the MIPS H/PC Pro CAB file on a CF card and install it from the CAB. However, if you're looking for the sync cable, the same cable works for all of the following devices: NEC 770, 780, 790, 800, and 880, and also the Casio A series and PA series of H/PCs
(eg, A-10, PA-2400W, etc
). You can search for the sync cable for any of these devices to find the one you need.