Pop, I regularly employ both of those species to control the stable flies on my horse farm. I buy them in a product called "fly predators" from Spalding Labs
. They seem like they're very easy to grow and very forgiving of the conditions. When we order them, they arrive a few days later in a small sealed plastic bag. If I remember correctly, there's a piece of cardboard or something in the bag with them. It's probably slightly damp. Anyway, they're in the cocoon stage when they first arrive, but after a few days they begin to hatch. After we see 10-12 of them hatched inside the plastic bag, it's time to release them in the horse pastures and manure piles. They're quite effective at controlling the fly population.
You can look at the instructions
from Spalding Labs to get an idea the conditions to keep them in. They recommend temperatures around 80-85 Fahrenheit.
Would you like me to send you a box of horse manure in the mail?