I finally did it and dove in. I was getting two Northern Leopard Frogs from a rescue and she offered me the hissing cockroaches w/out even knowing I had been meditating on it. So there ya go! I got a few and hope they breed for me.
I am no longer afraid of them since they showed me that they each have their own personality. And I saw a male courting a female with a whistley-hissy song and attempting to copulate with her. Fear melted away with deeper understanding.
All these worlds around us are so amazing!