Hello. I have a Casio Sampling keyboard SK-200 that belonged to my mother. One of he keys was broken. I was told by a Casio referred Casio junk yard in California to take it apart and the part number would be on the back of the keys. He said that several keys would be one piece/part. The keyboard is actually divided into two parts and there are no part numbers on them. Only key numbers. I am trying to find out if there I a way to determine the part number, and then find a place that may have it. Also, it appears to be exactly the same as the keyboard on my Casio CZ-230S keyboard, so I am wondering if they are standard keyboards for smaller synthesizers of that time. Does anyone have any direction for me? TIA.