I can sell you an equivalent one. Same basic assembly as the Defender stick, fits the Defender panel. Has black joystick ball, the repro red ball handles will fit if you drill the hole for it slightly larger.
You can also find this unit in most every Universal brand cocktail game that used a 2-way joystick.
To recap, Universal 2-way, fits the Defender panel, has most of the parts in common, and can take the repro defender stick with a small modification, and I have at least one available.