Monzon:
Rubbermaid tub with lid (cut out a section and glue screening to it) with about an inch or two of coir substrate. I recommend mixing in hydrated water crystals into the coir substrate to help maintain humidity. These guys need high humidity and heat. Put in a dish of water crystals and another of high quality food. Add a layer of roach barrier on the inner rim of the container for extra security. I also stack 4 egg carton sheets on top of one another on one side of the enclosure. The P. nivea nymphs burrow in the substrate while the adults stay in the egg carton. Mist the enclosure throughly once or twice a day. You have to put coir or the like, or the nymphs will die. Give them a good blacklight for heat (don't use daytime heat bulbs for roaches-they are nocturnal so the light bothers them). Get the setup right, keep it humid and they will breed very readily. Females grow to about an inch, males less than half an inch. The thing is, in order to start a stable colony and be able to feed P. nivea off immediately, you need around 200-300. It's an investment, as they reproduce themselves perpetually, conditions provided.
Fluxlizard: The larger versions are called Panchlora sp. "giants" (no exact species known). They are not readily available, you just have to look at invertebrate classifieds and roach forums.