Check out the site sponsors. There are multiple sponsors that offer a variety of feeders. Roaches, horn/silk worms, crickets, Phoenix worms, etc all make a good variety.
I buy hornworms and feeders from Linda at the local expo once or twice a month. She has some quality bugs, I usually pick up 2-3 pods of hornworms from her at a time. I've never had a single worm from her die on me. If she notices that there is a dead worm in a pod I'm interested in she gladly replaces that worm with a live one. That's customer service if you ask me! Of course, if you're ordering online, receiving a DOA worm can't always be helped