I have the same issue, now on both h800's so time to fix rather than keep buying new.
I assume the micro usb jack is only using the 2 power pins (5v & ground), making it a little less challenging.
And as I keep breaking these by getting out of the truck forgetting that it's plugged-in charging, x I need a design that is more forgiving.
I plan to salvage a female micro USB connector from a cable and solder it in with the new jack hanging about 2-3cm out of the headphones on a short stub of cable.
The idea is IF I forget again, at least the pull should be straight out and simply unplug, rather than some angle and break.
Will check back with progress...