Hello
Where do you think I may bet a female expansion port connector? Since there's a serial port, it should be possible to wire it to a bluetooth chip, adding bluetooth support to the 6000L from the serial port. Since there's a cavity there, it wouldn't even protrude from the 6000L or use a SD/CF port.
It's been done for other devices, so if one can purchase a spare expansion connector it should be possible...