Does anyone know where I might find some Prodiamine 65WDG in smaller portions? I have only seen this in 5 lb containers and that much would last me 10 years. I only have 10K sq ft of area to cover. From what I've read, the shelf life on this is only 1-3 years. Has anyone ever spotted 1 or 2 lb containers of Prodiamine 65WDG?