yup ace hardware might have them, they cost about 10$ for a tupperware or them. Usually most of mine were ok, but had a few batches that had alot of dead ones. EVentually they started banging tho bc i had tons of them with no spots so immature ones so they were ovb eating something. great organic alternative. If they fly too much you can just dab them with cola or some kinda sugar water to semi glue their wings
Bio Control Network is THE place for beneficial insects and parasites.... http://www.biconet.com/biocontrol.html The wee bags, or by the gallon if your treating 10 acres. They also have bugs, and parasites specific to whiteflys, thrips, spider mites and fungus gnats.