Dunno how I missed the Centipedes and millipedes, thanks for covering those, Eli.
Edit: I checked out NilesBio, and they don't appear to be a great option for feeder insects; for one thing, the roaches they offer are american cockroaches, capable of climbing glass, as well as capable of becoming a pest in the home. I would highly recommend against American cockroaches. Dubia Roaches(Blaptica Dubia) Cannot climb smooth vertical surfaces, and breeds at high temperatures around 80-90 degrees. Also, they appear to be geared towards learning facilities-the bullfrogs even bear a disclaimer:
"We do not sell live frogs to non educators. They are not sold for pets."
I'm sorry, but I don't think this site is what you're looking for.