Hi!
Those are very hard to find (if even possible).
There are a few options left for you.
1: Buy a broken PowerA controller motherboard (or controller) and desolder the Micro USB port from the broken one and then you can use that one.
2: Contact the seller if they have any replacement parts available (unlikely, but worth a try).
I also found some other website where people was asking the same question, but they didn't found a replacement part as well, unfortunately...
Hopefully you will get it fixed!!
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