It's practically impossible to find a replacement I/O assembly cable.
My daughter broke her USB connector and I had to replace it.
Even though it's a standard micro USB connector, the PCB housing is pretty special.
I managed to find a somewhat similar housing with RS components, and replace it, but it took some creative soldering.
I don't recommend this though, if you're not experienced with fine pitch rework soldering, as the procedure does require some skill.