Repair Casio CTK731

H Everybody. I have a Casio CTK731 and the inlet power ( the power adaptor mounted on the keyboard) got broken ( the small wire in the middle that ensure the connection detached). Anybody can help me to find the correct spare part? Thanks

you mean this?

If so - happens a lot! Remove the board where it is located and check whether the eyelet got torn off the circuit board. If so, take that piece off, straighten the middle pin vertical, use a piece of wire (ie piece of an old resistor or such) wrap it around the pin that is now free. Then scrape some lacquer off the trace beyond where the pin was torn and solder the wire to that piece of circuit board trace. If you find a hole somewhere close, put the wire through that as well - added security.