The control panel is just plywood, so with a router you could make your own.
You could check with Bob Roberts for the leaf buttons & switches:
http://homearcade.org/BBBB/buttons.htmlIf authenticity isn't an issue you could substitute GGG NovaGems or Happ translucent buttons; it would look the same but the button feel would be a little different.
The 2 way joystick is another issue; haven't seen those for sale. Keep an eye on eBay for them if you want to keep it authentic, or maybe substitute a 4 way? The standard Wico leaf sticks seem like they won't fit in there because of the lack of depth.
I have a Williams Moon Patrol cocktail (that was originally a Defender) awaiting restoration. The joystick is the same except horizontal instead of vertical, and it doesn't have the translucent buttons. Thankfully my control panels are intact.