I also have a couple of Surinam Cockroachs. They were unwanted pets that came with 500 baby Indian stick insects. the owner didn't even know they were there so I didn't know what they were at first. These particular cockroaches like the Indian sticks breed by Parthenogenesis so don't need a male :-\
This is a newly shedded one
Dried out
And fully grown. I've found that their favorite food is grape and rat nugget