Anyone got a copy of this?

I've got a T25 503 that failed a firmware update early on (just after the feature enable screen, just before it kicked the radio into bootloader mode.)

Radio still works fine, but it doesn't want to talk to PCP, Upgrader.exe or the software update tool anymore, even after I short pins 17+18 to put it into bootloader mode. It still echoes characters on the serial port when plugged in, so I know the physical connection is good.

I'm guessing it lost its serial number and got confused.