Hello Trident
If you fancy a bit of Do It Yourself

1. Secure the Casio to a board
2. Attach 2 arms with hinges to the back of the computer desk
3. Secure the board to the arms so that the rear of the board is clear of the front of the computer desk.
4. Secure the cables to the arms

You will now have the Casio in front of you with the keyboard and mouse behind.
When you have finished playing, just fold up the board and arms above the monitor, and secure in that position.
The computer can then be used as normal.
Hope this helps

Bill