Truly a mom and pop - It's her and her husband, and her young kids.
(And she's younger than me!) She sells crickets and mealworms (beetle larvae) by the dozen and always has those in stock. She'll often have big mealworms, and when she can get them in safely she'll have waxworms (a type of caterpillar - too hot and they die on the trip). She's had the roaches once, and will vary rarely have silkworms (another caterpillar) since they're hard to keep alive. It just depends where she's ordering from, but being able to get a variety of things locally is nice.
I'm also on the hunt for Phoenix worms, Calci worms, or Soldier Grubs. All are names for soldier fly maggots. Their calcium content is astronomical! And they're supposed to stay in larvae form for a long time, so they make a great food. Not many places carrying them yet. (Wonder why?
Most pet shops will have at the very least crickets and mealworms. (And one crab will tear through a dozen live mealworms in a few minutes.) The other stuff is a bit harder to find and if you have a shop that specializes in reptiles they'll be much more likely to carry these types of things! I would ask an employee or call the store and see what they carry - they may not have it in the front of the store as it's gross looking and often more sensitive to temps and disturbance. You may need to Google whatever name they give you as well - there are so many different "pretty" names for feeder worms! (ie, Hornworms are called "Goliath Worms")