Mine has been damaged for a while, but I could charge the tablet nevertheless, now it's very difficult to find the correct way to insert the plug and make a good contact.
I saw places online selling the complete back cover, but I just need the socket.
If I cannot find the correct one maybe I could do a hack job using one for a cell phone (I don't know where to get that either) and some loctite, though the tablet socket isn't soldered making the hack slightly more difficult.
I'd prefer the proper replacement part though.