Firmware upgrade for X-5 Autopilot VIA C80 Classic

Hello,

I have an X-5 autopilot running firmware v1.2. I need to upgrade the firmware to the current v3.05 to take advantage of the fixes listed in the change log, specifically those related to the handling of Seatalk and Seatalk NG. However, I have a C Series Classic C80 plotter, and for some reason there is for firmware image for upload to the X-5 using this specific plotter.

http://www.raymarine.com/view/?id=3770


My questions:

Is this firmware available somewhere so I can upgrade the X_5 using the C80?

If not, is it possible to upgrade the firmware in the X-5 in any other way? Possible an interface using an adapter and a PC?

Thanks in advance for any suggestions.