I don't think 4 orange drops in parallel would work for a 4mfd electrolytic cap. Orange drops are not electrolytic. I don't think they are polarized even though they have one end marked. I think the mark just indicates which lead is connected to the foil in the cap. Then again memory isn't what it used to be either
Unless they are controlling frequency most of those caps are probably not that critical value wise. I would use the closest value at the same or higher voltage. Only exception would be the 4 at 475 for that I would use a 450 volt cap.
Bill R