Picked up this Command Precision Joystick via eBay. Has a 16 pin plug connector. I already had a RetroConnector Adapter that I use with my Kraft 9 pin D connector and Virtual II Emulator. The Command Precision Joystick works very well playing SeaDragon, both x and y axis and fire buttons too. http://retroconnector.com/products/apple-ii/joystick-shield/
I added this picture so people would see orientation of pins cable on Apple II.