From my recent invoice, notes about stock/availability/lead-times are from Taito:
G5500487B CONTROL STICKER (2J14B)ZB/VEWLIX @JPY11760 -we can prepare 1pc right now.
E3102171A CONTROL PLATE(2J14B)ZB/ @JPY8400 -In stock
E3018350Z JOYSTICK BRACKET @JPY1800x2=3600 -In stock
L3000574A K HARNESS(2J12B) VEWLIX @JPY17600 -Lead time 45days
P4320400T SELF LOCKING NUT-U M4 @JPY39x50=1950 -Lead time 15days, minimum order quantity 50pcs
...I also got:
E5000631A KEY LY-1153(F750-MSDS) @JPY650x2=1300 -In stock
E5000630A LOCK LY-1153 SINGLE(F750-MSDS) @JPY1,040x5=5200 -Lead time 25days
and you'd need the buttons and stick of your choice