Nikko Alpha II Capacitor question

You should find that 2 of them are shorted on the PCB, so just use either.

New caps are going to be a lot smaller so won't need the same physical mounting.

Also, check the temp rating of your replacements. Make sure you get same or higher temp rating. More temp = longer life.

the three pin types are still available, check digikey, do some searching.

if they are three ’wire’ types as the cans have solderable tabs for wire, or if they have tabs or pins that are for sticking through holes for soldering right to the board...both types are generally available.

You might have to go up in voltage and capacitance, to like 80vdc at 12,000 to get a can that is the same size diameter.

If they look like this (except three pin, not 4), then you should have the ability to get a higher voltage replacement. A higher voltage is fine, no big deal. (Image is of nikko alpha 440 capacitors)

They are still made in that pin configuration, finding them in stock is the bigger problem.

try digikey, mouser, newark, and so on.

Have you taken them off the PCB? I don't think you will find any 3 pin capacitors any more anywhere near that size, only 4 pin.