Sony Ericsson G36e Fixed wireless terminal

[Coman Bogdan]

Hello
I am stuck in a no man's land and any suggestion would be greatly appreciated. I cannot find a system interface cable for Sony Ericsson G36e FWT. It seems it has 18 pins on one side and it is, as usual, a proprietary design. If someone could help me with it's layout, technical specs, similar cable I would appreciate it.
I cannot rewrite the firmware without that piece of cable.
Thank you very much
Bogdan