Panacur is 22% Bajillions of places carry it. I've had great luck using it.
Panacur is Fenbendazole, not Flubendazole, different meds. Fenbendazole should be added to the food. Flubendazole is safe to be added to the water column. Tons of issues reported on discus when Fenbendazole is added to the water. Many fish die shortly after treatment.