The company I just started working with is coming out with a line soon. As of now we only have an organic Spider Mite and Egg killer. And even that is limited to gallons currently. We are looking in to 5gal. and 55gal. drums at the moment. If you PM me I can arrange a demo, or sample for you.
I know this does'nt solve your immediate need, but we are working feverishly to make it happen.