Anybody know where you can by aerosol cans of wasp nest spray - the kind that sprays a narrow stream of foam up to about 3-4 meters? I've been to many hardware, homeware, and garden-type stores, but have not found it yet. They have liquid poisons and aerosol cans for short distance - maybe up to 30 cm, but nothing long distance. I have a wasp nest that is a couple of meters out of reach.