I built a lot of Joysticks, both Happ, and Japanese style and a Korean too. If the control panel is wood and can be removed, then carving it up and drilling holes is only a matter of tools.
Like I said, you won’t be able to get the exact joysticks that come on a Neo Geo Candy Cab “LS-32-01” unless you do some wood work to the CP witha router and drill.
But the Sanwa JLW-TM from Lizardlick will be a the closest replacement without router wood work. The mounting holes on the default JLW plate line up perfect with Happ/iL too. Maybe instead of asking Chad for the “Japanese Candy Stick” you should ask if a JLW-TM will fit in a wooden control panel. I saw a forum post where a guy put a JLW-TM in his SFII World Warrior Cab, and they where proper height. The control panel from a American SF2 and Neo Geo should be the same depth and same mounting holes.
And, if for some reason the JLW is too short on the shaft, you can extend it with one of these.