Take your capacitor (condensor) to a shop that repairs electric
motors, or maybe appliances
(laundry machines, pumps, these kinds of things). The same capacitors are used many times with single-phase motors for either "start" capacitors or "run" capacitors. They are very common, I have found them in some very remote ports
because they are used in many things.
It would be best if you can find one exactly the same, but:
It does not matter if the voltage is higher (440V, 600V, etc.). In fact this will be better. If the voltage is lower you could probably be OK to 330V or about so. It will not last as long, but maybe until you get to a bigger city.
If the capacitance changes you will change the voltage of the AVR. Probably OK 200-240uF or so, the more you are different from the original the more the AVR voltage will change.
If your location is correct:
condensador de marcha or capacitor de marcha and condensador/capacitor de arranque
If you cannot find one capacitor of 220uF you can add capacitors in parallel
, so 120uF + 100uF would be OK.
Also, do not worry too much about shape, as long as you can fit it into the box the exact shape is not important, only the ratings.