The original blue one is a polyester type (IE = greencap) but for that application a disc ceramic would do equally well.
So your greencaps would be perfect.
It is NOT a polarised type so you shouldn't use a tantalum or electrolytic type.
+1 on that.
Make sure you remove every sign of corrosion and replace any component that has corrosion on the legs.
I also remove the solder out of any via that has been affected also and reflow them with solder.
