While trying to troubleshoot why an A50 base station wouldn't power on at all - my probe ripped off a component on what I believe to be the data+ and data- lines of the USB connector. It is labeled "L1" - which I believe is the symbol for an inductor of some kind.
From searching the web - it actually looks more like a choke/filter.
And here is the component that looks the most like it that I have been able to find....
That looks to be a data line choke (essentially two inductors in one package). You would need to measure the inductance of the one you have. Both sides will be the same value. However to get confusing some of the chokes on the market are rated by resistance rather than just nH (inductance), you might get away with measuring just the resistance and getting one from there.
Just to update -- with the assistance I was given here, I was able to pull a choke from a lenovo thinkpad USB data track and place it on this headset base. I soldered on the new USB port -- and now everything works as expected. Happy days.